Kernel 4.15rc2+78d9b048446c3c0a83313444fb706f8f3bccdae7: Black screen.
Note: I installed the linux-image-...-generic deb only as the header
ones seemed to require libssl1.1...?
Anyway, I did some research on my own as well.
First, I had a look at the commits between 4.15rc2 and 4.15rc3. The only
one I could see being relevant is this one:
commit a703c55004e1c5076d57e43771b3e11117796ea0
Author: Daniel Vetter <daniel.vet...@ffwll.ch>
Date: Mon Dec 4 21:48:18 2017 +0100
drm: safely free connectors from connector_iter
...it seems relevant because the error I get is "Cannot find any crtc or
sizes", and the code emitting this error message (in
drivers/gpu/drm/drm_fb_helper.c) deals with connectors.
This commit is then referenced in other commits later on as being
required to fix, but since 4.16 is "black screen" too those fixes seems
not have helped here.
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https://bugs.launchpad.net/bugs/1761751
Title:
Black screen on 18.04 + AMD RX460
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
I've been running 16.04 + hwe kernel 4.15 for a while now and recently
I'm now having a black screen instead. I've also tried an 18.04 daily
live USB stick, which has the same issue.
It probably started during an upgrade this week or last week. As a
start I'm blaming the Linux kernel since booting a 4.13 kernel works
just fine.
Known faulty kernel versions are:
* linux-image-4.15.0-041500-generic (mainline kernel),
* linux-image-4.16.0-041600-generic (mainline kernel),
* linux-image-4.15.0-13-generic (Ubuntu kernel),
* whatever comes with 18.04 daily live USB stick as of 20180404.
Not sure how to best collect logs and system information for you since
I'm not used to debugging black screens, so I'm just attaching lspci
as a start.
EDIT: Workaround found by adding "amdgpu.dc=0" to kernel boot
parameters.
To manage notifications about this bug go to:
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