plasmashell not starting

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plasmashell not starting

Today at 00:40:16

Did the upgrade to plasma 6.2, plasmashell didn't start. Starting from terminal got me this:

plasmashell: symbol lookup error: /usr/lib/libLayerShellQtInterface.so.6: undefined symbol: _ZN15QtWaylandClient14QWaylandWindow9wlSurfaceEv, version Qt_6_PRIVATE_API

Re: plasmashell not starting

Reply #1 – Today at 03:17:58

I think it's a bug in Qt this also happened to me after the 6.8.0 update. Luckily I still had the previous 6.7.3 version of the qt6 packages, did a downgrade, rebooted and it's working fine.

I hope someone has already reported it and that the Qt devs fix it in the next update.

EDIT: You should downgrade every qt6 related package if you can. Sorry for the bad advice. Also, the morphing tooltips effect (or whatever it's called) isn't working, that's the only weird thing I got after downgrading.

Re: plasmashell not starting

Reply #2 – Today at 05:07:32

Thanks! That worked.

Code: [Select]

pacman -Q | grep ^qt6- | cut -d ' ' -f 1

lists all needed packages, which you can then find with the correct versions in /var/cache/pacman/pkg and do

Code: [Select]

sudo pacman -U filename

Or if you have downgrade from AUR, you can do

Code: [Select]

sudo downgrade `pacman -Q | grep ^qt6- | cut -d ' ' -f 1`

and write 6.7.3 repeatedly, until it finishes

Re: plasmashell not starting

Reply #3 – Today at 09:45:39

hi,
same here this morning.
sddm screen frozen with X11,, or black screen with wayland.
i started by the obvious, downgrading the kernel to 6.11.2 and nvidia drivers

but no luck
thanks for the suggestion, i downgraded all qt6 packages (to version 6.7.3xxx instead of 6.8xx), and it works again