[Bug 100419] [BDW][EXT] igt at kms_flip@vblank-vs-dpms-suspend-interruptible hard LOCKUP on cpu 3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100419

--- Comment #11 from Libin Yang <libin.yang at intel.com> ---
I will debug on this issue. This is really strange that it shows:
<4>[ 1211.603059]  ? delay_tsc+0x3d/0xc0
<4>[ 1211.603059]  __delay+0xa/0x10
<4>[ 1211.603060]  __const_udelay+0x31/0x40
<4>[ 1211.603060]  snd_hdac_bus_stop_cmd_io+0x96/0xe0 [snd_hda_core]

>From my knowledge snd_hdac_bus_stop_cmd_io() will not cause such issue. So my
opinion is that maybe audio use udelay while delay_tsc() cause this issue
(which is the last dump of the oops). Maybe the tsc is off when audio is still
waiting for its response? What's your suggestion? If so, I think we can ask
kernel team to involve?

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170330/b2f52bd2/attachment.html>