Hi István,thanks a lot, this helps. Your reply reached only me, so I'm forwarding it to the bug below. In the next replies please use "Reply All", or keep [email protected] among the recipients, so that everything stays in the bug log.
On 06/10/26 16:55, Klug István András wrote: > I've managed to reproduce the issue. It isn't really hardware-dependent; > rather, it depends on the configuration. It occurs when both the LXQt > and Cinnamon desktop environments are installed on the PC. It doesn't > matter whether they are installed together during the initial OS setup > or if one is added later; I managed to install LXQt on a machine already > running Cinnamon, and the issue persisted. > - So, if both desktop environments are installed, you need to select > 'muffin' as the window manager. > - Launch LXQt as the active desktop environment. > - Switch to the second, third, etc., workspace using the workspace > switcher. > - In my case, a white background appears. It's not a system freeze, > though, because the menu can still be launched from the bottom-left > corner. > > In both instances, I am using Intel GPU hardware (Mesa Intel HD Graphics > 4000). I do not have a dedicated graphics card. > > > 1. Is it a Cinnamon session on X11 or on Wayland? > LxQT - X11 > > 3. Is the background a single image or a slideshow? > White screen. > > 4. Does the same happen when switching workspace with the keyboard > > (Ctrl+Alt+Left/Right)? > Not tested. > > 5. Does the white background stay, or does the wallpaper come back > > after a while? > Stay. On 06/10/26 16:59, Klug István András wrote: > 00:02.0 VGA compatible controller: Intel Corporation IvyBridge GT2 [HD > Graphics 4000] (rev 09) > DeviceName: Intel(R) HD Graphics Device > Subsystem: Intel Corporation Device 2002 > Kernel driver in use: i915So the white background shows up in an LXQt session with muffin as the window manager, not in a Cinnamon session. The xsession-errors file you attached comes from a Cinnamon session ("About to start Cinnamon (X11 backend)"), so it doesn't cover this case.
If you selected muffin as the window manager in LXQt on purpose: as far as I know, upstream supports muffin only as the window manager of Cinnamon. Its README says that muffin is "specifically adapted to work as the window manager for the Cinnamon desktop environment", and, like mutter (which it is forked from), running the plain muffin binary on its own is only meant for debugging. Without Cinnamon, muffin runs with a minimal example plugin, so it is not expected to work well as the window manager of another desktop. For LXQt I suggest using one of its usual window managers, such as openbox, xfwm4 or kwin.
Best regards, Fabio
OpenPGP_signature.asc
Description: OpenPGP digital signature
