[Bug 105405] [BDW] After screen turn off / turn on rendering get slow, one frame per few dozens of seconds [CRTC:39:pipe A] flip_done timed out

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105405

--- Comment #4 from Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com> ---
(In reply to russianneuromancer from comment #0)
> Created attachment 137916 [details]
> dmesg-tip
> 
> Originally reported here:
> https://bugs.freedesktop.org/show_bug.cgi?id=104573#c12
> 
> With Linux 4.15 it was easy to reproduce and with cod/tip/drm-tip/2018-03-08
> (fc93d196b8e428bc5a186bde78f412aa30081f38) it's now harder to reproduce, but
> still possible. I no longer can reproduce issue with rotate, but still can
> reproduce issue with screen turn off/turn on.
> 
> How issue was reproduced:
> On Ubuntu 18.04 x86_64 with Gnome 3.28 Beta.
> In Gnome Shell Wayland session.
> With boot option intel.psr=1
> Dell 7140 (M-5Y71) internal display is connected via eDP.
> 
> dmesg with "intel.psr=1 drm.debug=0x1e log_buf_len=1M" boot options is
> attached.


To be sure, the command line option you are using is "i915.enable_psr=1" right
? And not "intel.psr=1" like you've stated above.

Does this happen only if you boot with i915.enable_psr=1?

When do you start seeing the flip time outs? login screen? or are you running
any tests?

What happens if you keep the screen busy? like playing a video or let's say
keep moving the cursor?

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