Linux 5 regression causes no video out on some laptops in 19.04 beta

[Steve Pentland]

Duplicate of https://bugs.launchpad.net/ubuntu/disco/+source/linux/+bug/1824216

There is a known regression in the v5 kernel that causes laptop video to fail on some panels.

I can attest this happens on a Dell XPS 15 2-in-1 (9575) and wanted to give a heads up as this affects the current 19.04 beta.

Upstream tracking is here: https://bugs.freedesktop.org/show_bug.cgi?id=109959
With a patch here: https://patchwork.freedesktop.org/patch/296411/

I'm not sure what else I can include that was not already covered in those reports and tracking, but will do anything I can.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1824632/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[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 1824632

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.

[Steve Pentland (spentland)]

Cannot run apport-collect against linux, dpkg-query reports no packages found matching linux

[Steve Pentland (spentland)]

It appears the patch has been merged into mainline here https://git.launchpad.net/~ubuntu-kernel-test/ubuntu/+source/linux/+git/mainline-crack/commit/?id=788f07ebe040922c89e38f609b7890ba52a09db2

It also looks like a daily has been cut for this so I’ll give that a shot

[Steve Pentland (spentland)]

Can confirm that daily mainline 2019-04-13 fixes the issue on Dell XPS 15 2-in-1 9575.

Output of uname -a

Linux laptop 5.1.0-999-generic #201904122202 SMP Sat Apr 13 02:06:36 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Basic HW info:

CPU - Intel® Core™ i7-8705G CPU
GPU - Intel® HD Graphics 630 (Kaby Lake GT2) / AMD® Vegam

[Steve Pentland (spentland)]

The patch fixing this also appears to have merged into the disco tree for 5.0.0-12.13 here https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/disco/commit/?h=master-next&id=e7284ca99d327fd4d021b9fb0193407c3095ac3c

[VanVan (w-o)]

A new BIOS version (304) was released for the UX433FN that fix the problem