Vega graphics (2400g) in 4.15 kernel

[flip101]

There is a problem with vega graphics in the 4.15 kernel used with ubuntu 18.04

On my system sometimes the graphics work without problems. Other times i get textual information from booting. Or i get a black screen. Or the booting progress dots just keep on going. Or i boot to the desktop and half of the screen has an area that is not rendered correctly.

I tried the mainline kernel of 4.16 4.17 and 4.18 and these kernels don't have this bug. (However they give problems with my wifi).

Can the fixes in the newer kernels be backported to ubuntu 18.04 ?

Also read:
* https://bugzilla.kernel.org/show_bug.cgi?id=196683
* https://www.reddit.com/r/Amd/comments/7nqwoe/apparently_amds_request_to_be_excluded_from_the/

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1787489

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the proposed kernel and post back if it resolves this bug?
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.

Thank you in advance!

[flip101 (flip101)]

Ok i will test it. The proposed kernel is "only" version 4.15.0-33 though (the current versino is 4.15.0-32). It can take a while to report back because I'm going to travel.

[flip101 (flip101)]

After a quick test i see the problems remain (did like 10 boots).

By the way when half of the screen has rendering problems it looks like this https://imgur.com/a/n7SAa2i i had to make a picture with my smartphone because the screenshot looks normal. (the icon top left changed because i plugged in my smartphone).

But like mentioned before .. this is just one of the various states that can occur when trying to boot.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]