[Intel-gfx] [regression?] i915 generating wakeups even when idle

[Andrew Lutomirski]

On Tue, Dec 7, 2010 at 5:13 PM, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> On Tue, 7 Dec 2010 16:31:24 -0500, Andrew Lutomirski <luto at mit.edu> wrote:
>> On Tue, Dec 7, 2010 at 4:03 PM, Andrew Lutomirski <luto at mit.edu> wrote:
>> > Hi all-
>> >
>> > Somewhere between Fedora 13 (with 2.6.35, I think) and Fedora 14 +
>> > 2.6.36.1, i915 started generating exactly 50 interrupts per second
>> > (suspiciously equal to my refresh rate) when X is running.  I have the
>> > Xorg driver 2.12.0 (specifically
>> > xorg-x11-drv-intel-2.12.0-6.fc14.1.x86_64).  When I switch to a text
>> > console but leave X running, the interrupts stop.
>> >
>> > Any ideas what to look at?
>>
>> Quitting compiz fixes it.  Suspending compiz also fixes it.
>
> So it is the vblank interrupt. The vblank interrupt is get alive for a few
> seconds after the last use. If it keeps going, then either the system is
> as idle as you believe or we lost track of the last user and forget to
> switch off the interrupt.
>
> drm.debug=0xf (echo 0xf > /sys/module/drm/parameters/debug) will have the
> gory details of who/when triggers the vblank interrupt.
> -Chris

It's the seconds on the clock.  That causes activity once per second,
which looks like this:

[  708.109447] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109464] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  708.109524] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.109543] [drm:drm_ioctl], pid=1889, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  708.109574] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109590] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.109602] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109616] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.109704] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109729] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.109743] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109757] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.109774] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.109787] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.109800] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109813] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.109828] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.109843] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109856] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109869] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109882] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109896] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.109909] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.109921] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  708.109944] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.109963] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.109977] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.109991] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110067] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110090] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110105] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110120] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110138] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110152] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110166] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110180] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110196] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110211] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110232] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110247] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110261] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110278] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110292] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110305] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110319] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110335] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110350] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110388] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110404] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  708.110424] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  708.110449] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110463] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110478] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110501] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110515] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110528] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110542] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110558] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110573] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110591] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110606] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110621] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110636] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110651] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110667] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110682] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110697] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110712] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110727] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110743] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110758] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110773] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110788] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110803] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110818] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110833] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110848] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110863] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110878] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110894] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110909] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.110929] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.110943] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.110957] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.110974] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.110988] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.111023] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.111038] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.111056] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.111071] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.111092] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.111106] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.111121] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.111138] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.111152] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.111166] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.111179] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.111195] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  708.111210] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.111261] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.111409] [drm:drm_ioctl], pid=1889, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  708.111961] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.111977] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.111992] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112123] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.112194] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.112235] [drm:drm_ioctl], pid=2464, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.112250] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112266] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.112281] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.112297] [drm:drm_ioctl], pid=2464, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.112311] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112326] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.112354] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112369] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112384] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112428] [drm:drm_ioctl], pid=2464, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.112446] [drm:drm_ioctl], pid=2464, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.112464] [drm:drm_ioctl], pid=2464, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  708.112519] [drm:drm_ioctl], pid=2464, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.112534] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.112661] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.112710] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.112832] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.112999] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.113099] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.113185] [drm:drm_ioctl], pid=1889, cmd=0xc0086465, nr=0x65, dev
0xe200, auth=1
[  708.113201] [drm:drm_ioctl], pid=1889, cmd=0xc018643a, nr=0x3a, dev
0xe200, auth=1
[  708.113212] [drm:drm_wait_vblank], waiting on vblank count 35136, crtc 1
[  708.113222] [drm:drm_wait_vblank], returning 35136 to client
[  708.113299] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.113384] [drm:drm_ioctl], pid=1889, cmd=0xc0086465, nr=0x65, dev
0xe200, auth=1
[  708.113401] [drm:drm_ioctl], pid=1889, cmd=0xc018643a, nr=0x3a, dev
0xe200, auth=1
[  708.113412] [drm:drm_wait_vblank], waiting on vblank count 35136, crtc 1
[  708.113421] [drm:drm_wait_vblank], returning 35136 to client
[  708.113433] [drm:drm_ioctl], pid=1889, cmd=0xc018643a, nr=0x3a, dev
0xe200, auth=1
[  708.113445] [drm:drm_queue_vblank_event], event on vblank count
35137, current 35136, crtc 1
[  708.113464] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.114264] [drm:drm_handle_vblank_events], vblank event on 35137,
current 35137
[  708.114408] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.114500] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  708.114523] [drm:drm_ioctl], pid=1889, cmd=0xc0086465, nr=0x65, dev
0xe200, auth=1
[  708.114589] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  708.114606] [drm:drm_ioctl], pid=1889, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  708.114769] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.114871] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.114987] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115060] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115075] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115088] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115101] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115115] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115127] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115142] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115155] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115168] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115181] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115196] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  708.115208] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  708.115221] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.115341] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  708.615109] [drm:intel_gpu_idle_timer], idle timer fired, downclocking
[  709.109395] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109414] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  709.109474] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.109493] [drm:drm_ioctl], pid=1889, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  709.109525] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109540] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.109553] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109567] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.109662] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109687] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.109701] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109715] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.109732] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.109746] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.109758] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109771] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.109786] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.109801] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109814] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109828] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109841] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109856] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.109868] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.109881] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  709.109904] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.109923] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.109937] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.109951] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.109965] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.109986] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.109999] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110082] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110101] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110116] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110130] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110144] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110159] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110176] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110198] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110212] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110227] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110243] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110258] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110271] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110285] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110300] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110315] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110353] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110369] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  709.110389] [drm:drm_ioctl], pid=1889, cmd=0xc0106461, nr=0x61, dev
0xe200, auth=1
[  709.110413] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110428] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110443] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110466] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110480] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110494] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110508] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110523] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110539] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110557] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110572] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110587] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110602] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110617] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110632] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110647] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110662] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110677] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110693] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110708] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110723] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110738] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110753] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110768] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110783] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110798] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110813] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110828] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110843] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110858] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110874] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.110894] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110908] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110922] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110939] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.110954] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.110967] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.110982] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.110997] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.111034] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.111055] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.111069] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.111083] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.111101] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.111115] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.111129] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.111143] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.111159] [drm:drm_ioctl], pid=1889, cmd=0x40046460, nr=0x60, dev
0xe200, auth=1
[  709.111174] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.111224] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.111373] [drm:drm_ioctl], pid=1889, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  709.111944] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.111960] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.111974] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112085] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.112159] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.112201] [drm:drm_ioctl], pid=2464, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.112216] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112231] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.112247] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.112263] [drm:drm_ioctl], pid=2464, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.112276] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112290] [drm:drm_ioctl], pid=2464, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.112317] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112332] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112346] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112390] [drm:drm_ioctl], pid=2464, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.112408] [drm:drm_ioctl], pid=2464, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.112425] [drm:drm_ioctl], pid=2464, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  709.112479] [drm:drm_ioctl], pid=2464, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.112494] [drm:drm_ioctl], pid=2464, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.112622] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.112672] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.112945] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.113264] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.113458] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.113545] [drm:drm_ioctl], pid=1889, cmd=0xc0086465, nr=0x65, dev
0xe200, auth=1
[  709.113562] [drm:drm_ioctl], pid=1889, cmd=0xc018643a, nr=0x3a, dev
0xe200, auth=1
[  709.113575] [drm:drm_wait_vblank], waiting on vblank count 35186, crtc 1
[  709.113586] [drm:drm_wait_vblank], returning 35186 to client
[  709.113663] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.113750] [drm:drm_ioctl], pid=1889, cmd=0xc0086465, nr=0x65, dev
0xe200, auth=1
[  709.113768] [drm:drm_ioctl], pid=1889, cmd=0xc018643a, nr=0x3a, dev
0xe200, auth=1
[  709.113780] [drm:drm_wait_vblank], waiting on vblank count 35186, crtc 1
[  709.113791] [drm:drm_wait_vblank], returning 35186 to client
[  709.113803] [drm:drm_ioctl], pid=1889, cmd=0xc018643a, nr=0x3a, dev
0xe200, auth=1
[  709.113817] [drm:drm_queue_vblank_event], event on vblank count
35187, current 35186, crtc 1
[  709.113837] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.116037] [drm:intel_crtc_idle_timer], idle timer fired, downclocking
[  709.120544] [drm:drm_handle_vblank_events], vblank event on 35187,
current 35187
[  709.120636] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.120769] [drm:drm_ioctl], pid=1889, cmd=0x400c645f, nr=0x5f, dev
0xe200, auth=1
[  709.120791] [drm:drm_ioctl], pid=1889, cmd=0xc0086465, nr=0x65, dev
0xe200, auth=1
[  709.120856] [drm:drm_ioctl], pid=1889, cmd=0x4020645d, nr=0x5d, dev
0xe200, auth=1
[  709.120873] [drm:drm_ioctl], pid=1889, cmd=0x40406469, nr=0x69, dev
0xe200, auth=1
[  709.120907] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.120921] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.120936] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.120948] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.120962] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.120975] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.120987] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121045] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121060] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121076] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121090] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121105] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121119] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121133] [drm:drm_ioctl], pid=1889, cmd=0xc0086457, nr=0x57, dev
0xe200, auth=1
[  709.121147] [drm:drm_ioctl], pid=1889, cmd=0xc00c6466, nr=0x66, dev
0xe200, auth=1
[  709.121161] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.121281] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  709.621159] [drm:intel_gpu_idle_timer], idle timer fired, downclocking
[  709.754767] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1

Turning off the second hand does this:

[  782.144158] [drm:vblank_disable_fn], disabling vblank on crtc 1
[  783.764295] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  783.764712] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  783.773979] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  783.775272] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  783.775369] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  783.776339] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  787.682508] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  789.266658] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  789.266784] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  789.506046] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  789.506129] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  789.750636] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  794.768923] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  794.769177] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  799.754985] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  800.271319] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  800.271551] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  805.773517] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  805.773618] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  809.745476] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  811.275774] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  811.275984] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  816.778302] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  816.778511] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  819.754823] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  822.280557] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  822.280724] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  827.782699] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  827.782872] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  829.755157] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  833.284924] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1
[  833.285179] [drm:drm_ioctl], pid=1889, cmd=0x6458, nr=0x58, dev
0xe200, auth=1


Maybe that "several seconds" (5, according to the source) timer is way
too long.  Is there any reason that drm_vblank_put doesn't turn off
interrupts immediately (or, at the latest, on the very next vblank
interrupt)?  After all, preventing deep sleep whenever there is
display activity every five seconds seems like a waste of power.

--Andy

>
> --
> Chris Wilson, Intel Open Source Technology Centre
>