Comment 109 for bug 1685442

OS Fedora 26

lspci | grep -i vga

00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c)

uname -r
4.13.4-200.fc26.i686

dmesg | grep -i 'warning: cpu'
[ 14.405111] WARNING: CPU: 0 PID: 95 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 14.542111] WARNING: CPU: 0 PID: 95 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 34.885117] WARNING: CPU: 0 PID: 27 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 71.237130] WARNING: CPU: 0 PID: 706 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 81.989128] WARNING: CPU: 0 PID: 706 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 110.149133] WARNING: CPU: 0 PID: 706 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 120.901078] WARNING: CPU: 0 PID: 706 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 131.653135] WARNING: CPU: 0 PID: 706 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 149.061172] WARNING: CPU: 0 PID: 706 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]

dmesg | grep -i '*error*'
[ 14.304061] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:30:pipe A] flip_done timed out
[ 34.784061] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out
[ 71.136064] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out
[ 81.888061] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out
[ 110.048067] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out
[ 120.800067] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out
[ 131.552061] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out
[ 148.960067] [drm:drm_atomic_helper_commit_cleanup_done [drm_kms_helper]] *ERROR* [CRTC:35:pipe B] flip_done timed out

dmesg not tained report
[ 14.405076] ------------[ cut here ]------------
[ 14.405111] WARNING: CPU: 0 PID: 95 at drivers/gpu/drm/drm_vblank.c:1090 drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 14.405112] Modules linked in: i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops e1000e drm serio_raw ata_generic pata_acpi ptp pps_core video
[ 14.405125] CPU: 0 PID: 95 Comm: kworker/u4:5 Not tainted 4.13.4-200.fc26.i686 #1
[ 14.405130] Hardware name: Hewlett-Packard /30D8, BIOS 68MDU Ver. F.01 07/05/2007
[ 14.405140] Workqueue: events_unbound async_run_entry_fn
[ 14.405144] task: f34733c0 task.stack: f35ce000
[ 14.405161] EIP: drm_wait_one_vblank+0x1a1/0x1b0 [drm]
[ 14.405162] EFLAGS: 00010246 CPU: 0
[ 14.405164] EAX: 0000001f EBX: f6d94000 ECX: f73d8a80 EDX: f73d3fac
[ 14.405165] ESI: 00000000 EDI: 00000000 EBP: f35cfc40 ESP: f35cfc08
[ 14.405167] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 14.405168] CR0: 80050033 CR2: b7f5fc20 CR3: 17034000 CR4: 000006d0
[ 14.405170] Call Trace:
[ 14.405177] ? finish_wait+0x70/0x70
[ 14.405264] intel_get_load_detect_pipe+0x5d5/0x640 [i915]
[ 14.405323] intel_tv_detect+0x113/0x450 [i915]
[ 14.405385] ? intel_tv_get_modes+0x1f0/0x1f0 [i915]
[ 14.405400] drm_helper_probe_detect+0x42/0x80 [drm_kms_helper]
[ 14.405412] drm_helper_probe_single_connector_modes+0xbc/0x670 [drm_kms_helper]
[ 14.405428] drm_setup_crtcs+0x62/0x950 [drm_kms_helper]
[ 14.405437] ? schedule_preempt_disabled+0xd/0x10
[ 14.405443] ? __mutex_lock.isra.1+0x1d8/0x470
[ 14.405456] drm_fb_helper_initial_config+0x69/0x400 [drm_kms_helper]
[ 14.405464] ? __switch_to+0xb0/0x300
[ 14.405523] intel_fbdev_initial_config+0x16/0x30 [i915]
[ 14.405530] async_run_entry_fn+0x35/0x160
[ 14.405537] process_one_work+0x14b/0x340
[ 14.405544] worker_thread+0x39/0x3c0
[ 14.405550] kthread+0xf3/0x110
[ 14.405556] ? process_one_work+0x340/0x340
[ 14.405562] ? kthread_park+0x70/0x70
[ 14.405568] ret_from_fork+0x19/0x24
[ 14.405573] Code: 00 00 00 e9 e4 fe ff ff e8 4d c9 51 de 8b 45 d0 8d 55 dc e8 b2 d1 55 de 85 ff 0f 85 ee fe ff ff 56 68 8c 5e f5 f7 e8 4c 8a 57 de <0f> ff 58 5a e9 da fe ff ff 8d b6 00 00 00 00 66 66 66 66 90 55
[ 14.405619] ---[ end trace fa94df2d2728a060 ]---
[ 14.542062] vblank wait timed out on crtc 0
[ 14.542088] ------------[ cut here ]------------

lsmod | grep video
video 40960 1 i915