Within KDE's "Compositor" settings, I've got the "rendering backend" set to OpenGL v3.1 and the "OpenGL interface" set to EGL. When I log out of KDE and log back in again, I notice that my desktop wallpaper doesn't display. Instead, I still see SDDM's "login progress" screen. I have tried this several times and the result is always the same. If I set the "OpenGL interface" (back) to GLX, my desktop wallpaper instantly shows up (again). Furthermore, it displays as expected after logging out and logging back in to KDE (each time). I'm using "v1:2.99.917+478+gdf72bc5-3" of Arch Linux's "xf86-video-intel" package. I will attach a couple of screenshots to illustrate my point shortly. Reproducible: Always
Created attachment 95889 [details] My "SDDM" Desktop
Created attachment 95890 [details] KDE's "Compositor" Settings
With Intel I recommend to use OpenGL2+GLX. EGL doesn't work properly if you don't also enable DRI3.
This rather looks like plasmashell doesn't start? => Do you have a "plasmashell" process running when this happens? intel+DRI2 is bug #338150, but there's no panel and the kwrite window shows nicely on top...
@ Martin: Thanks, enabling DRI3 fixed the problem. Why don't they just use it as the default? @ Thomas: My main panel is set to "auto-hide" mode. The "plasmashell" process was running.
(In reply to Xavion from comment #5) > My main panel is set to "auto-hide" mode. Ah, ok. Just a guess ;-) *** This bug has been marked as a duplicate of bug 338150 ***