Bug 99181 - RS780 blank screen on boot
Summary: RS780 blank screen on boot
Status: RESOLVED MOVED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) All
: medium normal
Assignee: Default DRI bug account
QA Contact: Christopher M. Penalver
URL: https://bugs.launchpad.net/ubuntu/+so...
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-12-22 11:25 UTC by Chí-Thanh Christopher Nguyễn
Modified: 2019-11-19 09:21 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg from kernel 3.14 with drm.debug=15 (working) (319.27 KB, text/plain)
2016-12-22 11:26 UTC, Chí-Thanh Christopher Nguyễn 		no flags Details
dmesg from kernel 4.9 with drm.debug=15 (not working) (176.04 KB, text/plain)
2016-12-22 11:27 UTC, Chí-Thanh Christopher Nguyễn 		no flags Details
View All

Description Chí-Thanh Christopher Nguyễn 2016-12-22 11:25:28 UTC 
Hardware: BIOSTAR A780L

When booting with 3.15 or newer kernels, a monitor connected to the DVI port of the BIOSTAR A780L will stay blank.
Kernel 3.14 and older work fine.

I tried forcing the output to on with video=HDMI-A-1:e but this made no difference.
Comment 1 Chí-Thanh Christopher Nguyễn 2016-12-22 11:26:57 UTC 
Created attachment 128629 [details]
dmesg from kernel 3.14 with drm.debug=15 (working)
Comment 2 Chí-Thanh Christopher Nguyễn 2016-12-22 11:27:30 UTC 
Created attachment 128630 [details]
dmesg from kernel 4.9 with drm.debug=15 (not working)
Comment 3 Chí-Thanh Christopher Nguyễn 2016-12-22 19:11:02 UTC 
https://bugzilla.kernel.org/show_bug.cgi?id=91861 seems to be related, however this issue still happens with kernel 4.9
Comment 4 Christopher M. Penalver 2016-12-25 17:00:23 UTC 
Commit bisect requested in https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1651910/comments/25 .
Comment 5 Martin Peres 2019-11-19 09:21:00 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/766.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.