[Bug 106422] i915 time out with recent kernels: [drm_kms_helper] flip_done timed out

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106422

--- Comment #1 from Zakhar <alainb06 at free.fr> ---
More information.

I have narrowed it down:

16.04.1 - kernel 4.4.0-31-generic
==> Works OK with messages ("encoder detached but still enabled on pipe A.")
No visible slowdown apart for 3 or 4 stack traces in the log.

16.04.2 - kernel 4.8.0-36-generic
==> Shows the "time outs" bug


So there must have been a change that is affecting i915 between kernels 4.4.
and 4.8

Steps to reproduce:
- live boot on 16.04.1
- see all is Ok apart from some messages in the log
- live boot on 16.04.2
- see the boot takes much much more time and there are numerous timeouts
messages.

-- 
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/20180506/13e941bd/attachment-0001.html>