[Bug 103844]=?UTF-8?Q?=20=E3=80=90braswell=E3=80=91?="*ERROR* cpu pipe A|B|C fifo underrun" - can not recovery

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103844

--- Comment #6 from kait wang <wkcl00022 at 163.com> ---
hi Elizabeth:
now we have made some progress in this problem. 
firstly, we increase the Pre-allocated/total GFX in bios setting to maximum and
this problem was disappeared. 
secondly, the hrtimer is set in our config of kernel, which
CONFIG_HIGH_RES_TIMERS and CONFIG_SCHED_HRTICK are set to yes. howerev, once we
modify the config to disable the hrtimer, this underrun problem is disappeared.
so we think the underrun problem is related to the access to gfx memory which
could be effected by hrtimer. now we confused about the relationship between
hrtimer and gpu.
We really need your help and comments. expect for your reply again, thanks!

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20171211/1828b391/attachment.html>