Changing screen orientation crashes desktop with labwc

[jatofg]

After updating my Raspberry Pi 3B+ with Rasberry Pi OS bookworm 32-bit and enabling the new labwc compositor, attempting to invert the screen orientation crashes the desktop and sends me to the login screen. The desktop subsequently always crashes on startup. I'm using the official Raspberry Pi 7" touchscreen display.

When I try to invert the screen orientation and click Apply in the Screen Configuration tool, a new file .config/kanshi/config is created with the following content (and the crash happens instantly):

profile {
        output DSI-1 mode [email protected] position 0,0 transform 180
}

When I delete this file, I can log in again, but the screen orientation is not rotated, of course.

I'm attaching the .xsession-errors, an .xsession-errors without the rotation for comparison, and the /boot/firmware/config.txt. If you need any other logs or files to investigate the issue, I'll be happy to provide them.

config.txt
xession-errors_withoutRotation.txt
xsession-errors.txt

[cillian64]

Thanks for the report, I think this is caused by a pixman issue we're aware of and working on. Please could you try the following and see if it resolves the issue?

sudo apt install libpixman-1-0=0.42.2-1 libpixman-1-dev=0.42.2-1

[jatofg]

Yes, that resolves it

[Consolatis]

@cillian64 Is it fixed upstream and should labwc depend on a later version of pixman?

[cillian64]

@cillian64 Is it fixed upstream and should labwc depend on a later version of pixman?

This is actually a bug introduced in our downstream pixman package (which adds some extra ARM optimisations).

[Consolatis]

This is actually a bug introduced in our downstream pixman package (which adds some extra ARM optimisations).

Got it, thanks.