Public bug reported:
In the past I used lxdm on my Dell Inspiron 6400 laptop without
problems. After upgrading from Ubuntu 20.10 to 21.04, lxdm shows a fully
black screen, without even a mouse cursor. Attempts to interact with it
blindly don't work, which suggests it's somehow hanging, and not simply
failing to display.
Installing lxdm_0.5.3-2.1_amd64.deb from Ubuntu 20.10 does not fix the
problem. So maybe something else is at fault, because that lxdm worked
in Ubuntu 20.04.
The laptop has Mobility Radeon x1400 with the radeon driver. Though
using the fbdev driver instead doesn't change this bug.
I don't use LXDE and don't have it installed. I'm only using lxdm
because it is lightweight and fast, and I prefer other desktop
environments. This has never been a problem in the past.
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: lxdm 0.5.3-4
Uname: Linux 5.12.0-051200rc5-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu61
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Sat Apr 3 13:58:41 2021
InstallationDate: Installed on 2012-01-19 (3362 days ago)
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: lxdm
UpgradeStatus: Upgraded to hirsute on 2021-04-02 (1 days ago)
** Affects: lxdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug hirsute
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https://bugs.launchpad.net/bugs/1922443
Title:
Lxdm black screen after Ubuntu 21.04 upgrade
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