[Bug 106086] [CI] igt@*(suspend|hibernate)* | igt at kms_cursor_crc@* - vblank wait timed out on crtc 0

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Sep 24 07:19:29 UTC 2018


https://bugs.freedesktop.org/show_bug.cgi?id=106086

--- Comment #15 from Stanislav Lisovskiy <stanislav.lisovskiy at intel.com> ---
I have investigated this issue and figured out that drm_wait_one_vblank was
always timing out when going to suspend or resume. My idea was that this
happens because it sometimes waits for vblank when vblank interrupts aren't
turned on yet. However after some source code investigation it turned out that
it at least tries to turn on the interrupts before intel_display_suspend/resume
is called.

This seems to be not reproducible even in CI at the moment, so my guess was
that something has been fixed already or the chances of reproducing it got even
more slim.

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