[Bug 107820] [CI][DRMTIP] igt at pm_backlight@* - incomplete - system hang?

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107820

--- Comment #7 from harish.chegondi at intel.com ---
I turned on the debug messages in DRM and i915 and ran the test with the
changes mentioned in comment #6 and without those changes. I have been
comparing the debug messages during the system resume step for both the cases.
One difference I found out was if the crtc was active/inactive. When I ran the
test without any changes, the crtc state was inactive during system resume.
When I ran the test with the changes in comment #6, the crtc state was active
during system resume.

I am trying to find if turning off the DPMS is setting the crtc state to
inactive and that is causing the system resume step to not turn on the
backlight.


With the changes in comment #6:
-------------------------------
[ 4341.507980] [drm:drm_atomic_helper_check_modeset [drm_kms_helper]]
[CRTC:47:pipe A] needs all connectors, enable: y, active: y


Test without any changes:
-------------------------
[ 4341.507980] [drm:drm_atomic_helper_check_modeset [drm_kms_helper]]
[CRTC:47:pipe A] needs all connectors, enable: y, active: n

-- 
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/20190401/ad44e31e/attachment.html>