[Bug 89147] stuck on blitter ring GPU HANG: ecode 2:0x0000000a, in X

Sat Feb 14 23:53:30 PST 2015

https://bugs.freedesktop.org/show_bug.cgi?id=89147

--- Comment #4 from Harold Naparst <harold at alum.mit.edu> ---
I'll see if I can recover without rebooting.  Sometimes I can, and sometimes
not.  The problem may be related to screen blanking, which can be fixed by
using xset s.  In any event, whenever the screen turns off or sleeps, X
crashes.  Using UXA or other xorg or boot options does not seem to help. Here
is the latest one.  In this case, there was no error at
/sys/class/drm/card0/error either.

Feb 15 08:41:24 nuc kernel: [47882.539015] ------------[ cut here ]------------
Feb 15 08:41:24 nuc kernel: [47882.539021] WARNING: CPU: 0 PID: 23486 at
drivers/gpu/drm/i915/intel_display.c:1256 assert_plane.constprop.87+0x6b/0x80()
Feb 15 08:41:24 nuc kernel: [47882.539022] plane A assertion failure (expected
on, current off)
Feb 15 08:41:24 nuc kernel: [47882.539026] Modules linked in: vboxnetadp(O)
vboxnetflt(O) vboxdrv(O) snd_pcsp x86_pkg_temp_thermal
Feb 15 08:41:24 nuc kernel: [47882.539029] CPU: 0 PID: 23486 Comm: X Tainted: G
          O   3.19.0-gentoo #4
Feb 15 08:41:24 nuc kernel: [47882.539033] Hardware name:  /NUC5i3MYBE, BIOS
MYBDWi30.86A.0017.2014.1127.1854 11/27/201
Feb 15 08:41:24 nuc kernel: [47882.539035]  ffffffff81bffd20 ffff8800cecb36f8
ffffffff8186a9da 0000000000002828
Feb 15 08:41:24 nuc kernel: [47882.539036]  ffff8800cecb3748 ffff8800cecb3738
ffffffff8104b405 ffff88021ec15f88
Feb 15 08:41:24 nuc kernel: [47882.539037]  0000000000000000 ffff880214ad1000
ffff880214abf800 ffff880214abf800
Feb 15 08:41:24 nuc kernel: [47882.539038] Call Trace:
Feb 15 08:41:24 nuc kernel: [47882.539041]  [<ffffffff8186a9da>]
dump_stack+0x45/0x57
Feb 15 08:41:24 nuc kernel: [47882.539044]  [<ffffffff8104b405>]
warn_slowpath_common+0x85/0xc0
Feb 15 08:41:24 nuc kernel: [47882.539046]  [<ffffffff8104b481>]
warn_slowpath_fmt+0x41/0x50
Feb 15 08:41:24 nuc kernel: [47882.539048]  [<ffffffff8145d4eb>]
assert_plane.constprop.87+0x6b/0x80
Feb 15 08:41:24 nuc kernel: [47882.539051]  [<ffffffff814648a9>]
hsw_disable_ips+0x39/0x180
Feb 15 08:41:24 nuc kernel: [47882.539053]  [<ffffffff81464c53>]
intel_crtc_disable_planes+0x43/0x140
Feb 15 08:41:24 nuc kernel: [47882.539055]  [<ffffffff8146598f>]
haswell_crtc_disable+0x4f/0x3a0
Feb 15 08:41:24 nuc kernel: [47882.539057]  [<ffffffff814668f9>]
__intel_set_mode+0xa69/0xc90
Feb 15 08:41:24 nuc kernel: [47882.539059]  [<ffffffff8146d51b>]
intel_crtc_set_config+0xbfb/0xf70
Feb 15 08:41:24 nuc kernel: [47882.539062]  [<ffffffff813efb36>]
drm_mode_set_config_internal+0x66/0x100
Feb 15 08:41:24 nuc kernel: [47882.539063]  [<ffffffff813dd308>]
restore_fbdev_mode+0xc8/0xf0
Feb 15 08:41:24 nuc kernel: [47882.539065]  [<ffffffff813df314>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x24/0x70
Feb 15 08:41:24 nuc kernel: [47882.539067]  [<ffffffff813df37d>]
drm_fb_helper_set_par+0x1d/0x40
Feb 15 08:41:24 nuc kernel: [47882.539069]  [<ffffffff8147a245>]
intel_fbdev_set_par+0x15/0x60
Feb 15 08:41:24 nuc kernel: [47882.539071]  [<ffffffff813476cf>]
fb_set_var+0x19f/0x410
Feb 15 08:41:24 nuc kernel: [47882.539074]  [<ffffffff8106f4b9>] ?
check_preempt_curr+0x89/0xa0
Feb 15 08:41:24 nuc kernel: [47882.539075]  [<ffffffff8106f4e8>] ?
ttwu_do_wakeup+0x18/0xe0
Feb 15 08:41:24 nuc kernel: [47882.539077]  [<ffffffff81341736>]
fbcon_blank+0x226/0x300
Feb 15 08:41:24 nuc kernel: [47882.539079]  [<ffffffff813a39a5>]
do_unblank_screen+0xb5/0x1e0
Feb 15 08:41:24 nuc kernel: [47882.539081]  [<ffffffff81399bb8>]
complete_change_console+0x58/0xe0
Feb 15 08:41:24 nuc kernel: [47882.539083]  [<ffffffff8139adc0>]
vt_ioctl+0x1180/0x1430
Feb 15 08:41:24 nuc kernel: [47882.539087]  [<ffffffff8113657b>] ?
handle_mm_fault+0x73b/0xa50
Feb 15 08:41:24 nuc kernel: [47882.539089]  [<ffffffff8138d7c1>]
tty_ioctl+0x401/0xc70
Feb 15 08:41:24 nuc kernel: [47882.539092]  [<ffffffff8103f8d5>] ?
__do_page_fault+0x1e5/0x570
Feb 15 08:41:24 nuc kernel: [47882.539094]  [<ffffffff81173ee0>]
do_vfs_ioctl+0x2e0/0x4e0
Feb 15 08:41:24 nuc kernel: [47882.539096]  [<ffffffff812a60a7>] ?
file_has_perm+0x87/0xa0
Feb 15 08:41:24 nuc kernel: [47882.539098]  [<ffffffff81160482>] ?
vfs_write+0x1b2/0x1f0
Feb 15 08:41:24 nuc kernel: [47882.539100]  [<ffffffff81174161>]
SyS_ioctl+0x81/0xa0
Feb 15 08:41:24 nuc kernel: [47882.539102]  [<ffffffff8103fc6c>] ?
do_page_fault+0xc/0x10
Feb 15 08:41:24 nuc kernel: [47882.539103]  [<ffffffff81872e92>]
system_call_fastpath+0x12/0x17
Feb 15 08:41:24 nuc kernel: [47882.539104] ---[ end trace 4ccbee195f5d9637 ]---
Feb 15 08:41:24 nuc kernel: [47882.603884] [drm:intel_dp_start_link_train]
*ERROR* failed to enable link training
Feb 15 08:41:24 nuc kernel: [47882.606555] [drm:intel_dp_complete_link_train]
*ERROR* failed to start channel equalization

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