Using gdm3 causes plymouth to flicker to/from VT text

[ventrical]

I originally thought it was a kernel problem but please read this thread here.

https://ubuntuforums.org/showthread.php?t=2372108

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gdm3 3.26.0-1ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic x86_64
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity:Unity7:ubuntu
Date: Fri Sep 22 15:27:34 2017
InstallationDate: Installed on 2017-09-05 (17 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170820)
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

Can you clarify what you mean in "flickerty with verbos page script"? Does that mean a VT is visible for a while (black background)?

[ventrical (dale-f-beaudoin)]

This bug can be marked as invalid. Installing lightdm seemed to have solved the problem.

What was happening is that after 4.13 kernel/reboot I got a blackscreen with a coulum of verbose charS the was flashing from top down, bottom up. (the rows of characters were flashing like a scroll like it was truing to force itself to boot into gdm3. I can re-install gdm and reboot and see if I can emulate.

Stand by please.

[ventrical (dale-f-beaudoin)]

This bug can be marked as invalid. Installing lightdm seemed to have solved the problem.

What was happening is that after 4.13 kernel/reboot I got a blackscreen with a coulum of verbose charS the was flashing from top down, bottom up. (the rows of characters were flashing like a scroll like it was truing to force itself to boot into gdm3. I can re-install gdm and reboot and see if I can emulate.

Stand by please.

OK.. I installed gdm3 and gnome session and it is back .. the flickerty from between plmouth and before gdm login loads up.

Please leave this bug open.

[Daniel van Vugt (vanvugt)]

Can you please take a video or photo of the problem?

[ventrical (dale-f-beaudoin)]

If you watch the top,left hand corner you will see one flash and then the cursor blinking between plymouth and gdm. Sometimes there is no flickerty. Sometimes there is full screen flickerty sometimes only cursor. In this video you will see one small flash of verbose code in top left , then cursor flash about 7 times.

https://www.youtube.com/watch?v=7UlXdWneUw8&feature=youtu.be

[Daniel van Vugt (vanvugt)]

I'm told that the *dm tells plymouth (the boot progress screen) to stop. So that's probably what the flicker is related to.

[ventrical (dale-f-beaudoin)]

Daniel,

Please look at this link:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1718713

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 17.10 (artful) reached end-of-life on July 19, 2018.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.