[Bug 97450] [SKL] [regression] Random display flickering on Kernel 4.8 with dual-screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97450

--- Comment #35 from kolAflash <kolAflash at kolahilft.de> ---
Bug exists on all Linux kernel versions from 4.8.0 to 4.8.3 (including) on
openSUSE 42.1, installed from here:

http://download.opensuse.org/repositories/Kernel:/stable/standard/

Some suspicious lines from dmesg, running 4.8.3
--
[    2.213187] BERT: Can't request iomem region
<00000000dbfa6f98-00000000dbfa6fab>.
...
[  369.631560] Corrupted low memory at ffff9b6ac0001000 (1000 phys) =
6000010000100000
[  369.631568] Corrupted low memory at ffff9b6ac0001008 (1008 phys) =
100001000001c
[  369.631571] Corrupted low memory at ffff9b6ac0001010 (1010 phys) =
100001000001c70
[  369.631574] Corrupted low memory at ffff9b6ac0001018 (1018 phys) =
1000001c8000
...
[  369.637365] Corrupted low memory at ffff9b6ac00050f8 (50f8 phys) =
e000000000100000
[  369.637366] Corrupted low memory at ffff9b6ac0005100 (5100 phys) = 1000008f
[  369.637367] Corrupted low memory at ffff9b6ac0005108 (5108 phys) =
1000008ff0
[  369.637368] Corrupted low memory at ffff9b6ac0005110 (5110 phys) =
560554504224
[  369.637373] ------------[ cut here ]------------
[  369.637376] WARNING: CPU: 0 PID: 2947 at ../arch/x86/kernel/check.c:141
check_corruption+0xa/0x40
[  369.637376] Memory corruption detected in low memory
[  369.637458] CPU: 0 PID: 2947 Comm: kworker/0:0 Not tainted
4.8.3-1.g94eb9fb-default #1
[  369.637458] Hardware name: Dell Inc. Precision Tower 3420/08K0X7, BIOS 1.3.6
05/26/2016
[  369.637460] Workqueue: events check_corruption
[  369.637461]  0000000000000000 ffffffff883a3e62 ffff9b726a6f3dd0
0000000000000000
[  369.637463]  ffffffff8807ddde ffffffff88e2ab00 ffff9b726a6f3e20
ffff9b72ddc18e80
[  369.637465]  ffffd6a43fc02d00 0000000000000000 0ffffd6a43fc02d0
ffffffff8807de4f
[  369.637467] Call Trace:
[  369.637474]  [<ffffffff8802eefe>] dump_trace+0x5e/0x310
[  369.637477]  [<ffffffff8802f2cb>] show_stack_log_lvl+0x11b/0x1a0
[  369.637480]  [<ffffffff88030001>] show_stack+0x21/0x40
[  369.637482]  [<ffffffff883a3e62>] dump_stack+0x5c/0x7a
[  369.637488]  [<ffffffff8807ddde>] __warn+0xbe/0xe0
[  369.637492]  [<ffffffff8807de4f>] warn_slowpath_fmt+0x4f/0x60
[  369.637494]  [<ffffffff880600ea>] check_corruption+0xa/0x40
[  369.637497]  [<ffffffff880966bd>] process_one_work+0x1ed/0x4d0
[  369.637500]  [<ffffffff880969e7>] worker_thread+0x47/0x4c0
[  369.637502]  [<ffffffff8809c59d>] kthread+0xbd/0xe0
[  369.637505]  [<ffffffff886d461f>] ret_from_fork+0x1f/0x40
[  369.638807] DWARF2 unwinder stuck at ret_from_fork+0x1f/0x40

[  369.638808] Leftover inexact backtrace:

[  369.638810]  [<ffffffff8809c4e0>] ? kthread_worker_fn+0x170/0x170
[  369.638811] ---[ end trace 79d3bdfae01f66f9 ]---
[  474.385619] [drm:gen8_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20161020/bb484fcf/attachment.html>