lubuntu screen corruption only on cold boot.

[thom]

steps:
1) cold boot (power on)
2) choose boot (grub)
3) login (lightdm)

When logging in, the login rectangle doesn't disappear like it should.

4) Xorg starts

Desktop appears but the outline of the login-rectangle is still there.

Also everything else that is drawn on the screen stays drawn (i.e. closed windows are still visable, a moved window leaves a "trail") as if the system "forgets" to erase previously drawn objects.

Strangely enough, the mousepointer doesn't seem to be affected.

5) sudo restart lightdm

6) login again

Everything is suddenly working as it should ( high order magic ?? )

I have had this problem before with kernels newer than 3.13.0-8 but a kernel header install followed by a kernel image reinstall would always fix it.

Since kernel 3.13.0-18 this fix doesn't work anymore.

I assume the problem is not directly in X (??) maybe in kernel (??) since it first appears in lightdm (before X starts)

Processor: dual core turion
Chipset: AMD RS780
Videochip: RS780M [Mobility Radeon HD 3200]
Driver (lsmod): radeon

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xserver-xorg 1:7.7+1ubuntu8
ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
Uname: Linux 3.13.0-18-generic i686
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
CurrentDesktop: LXDE
Date: Sat Mar 22 01:15:43 2014
InstallationDate: Installed on 2014-01-04 (76 days ago)
InstallationMedia: Lubuntu 14.04 "Trusty Tahr" - Alpha i386 (20140102)
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)

[thom (tsk)]

[probably "SOLVED"]
the bug seems to have disappeared completely.
this might probably be due to newer kernel.

Linux 3.13.0-30-generic #54-Ubuntu SMP Mon Jun 9 22:45:01 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

[penalvch (penalvch)]

thom, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1295900/comments/2 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.