I'm Linux user but haven't use KDE before. Now I installed Fedora 23 with Plasma. But, it's messed up, I cannot use it at all.
Once I log in, I don't see bottom panel, although I can click on it blindly. If I start applications in that way or via desktop shortcut, I cannot see them although they are running, I see desktop background only.

If I press Ctrl+Alt+F2 I get only a smaller desktop screen.
I can only log out and then press Ctrl+Alt+F2 to get a terminal and log in and run startx. Only then I can use Plasma normally.

I tried deleting .kde profile, without success. Please help.

just so anyone reading this is clear - when you start with startx all is good you see and can use everything

with Fedora 23 you are running 5 not Kde 4, correct? 5 doesn't use ~/.kde except for KDE 4 apps that have not been ported afaik, in 5 config files are in ~/.config

Is this a clean install or an upgrade from Fedora 2x ?
does a new user experience the same?

try removing ~/.cache

try removing any plasma* or kwin* files in ~/.config

This is a clean install.
Removing ~/.cache and plasma* and kwin* files in ~/.config didn't help.
With new user also the same.

If you open an app with alt+F2 do the apps's windows show?

try

Code: Select all

kwin_x11 --replace

try

Code: Select all

kquitapp plasmashell && sleep 5 && plasmashell

Sounds like a conflict between the sddm GL context and all the GL contexts inside the session.
Press "SHIFT+Alt+F12" (*SHIFT*!!!) to suspend the compositor and see whether that makes any difference.

google01103 wrote:If you open an app with alt+F2 do the apps's windows show?

No. I tried with "calc" and Kcalc doesn't show, but some widget Calc does. Alt+F2 is the only way to run a command.

google01103 wrote:try

Code: Select all

kwin_x11 --replace

try

Code: Select all

kquitapp plasmashell && sleep 5 && plasmashell

Same.

luebking wrote:Sounds like a conflict between the sddm GL context and all the GL contexts inside the session.
Press "SHIFT+Alt+F12" (*SHIFT*!!!) to suspend the compositor and see whether that makes any difference.

I get black screen with a cursor.

this looks appropriate https://forums.gentoo.org/viewtopic-p-7849988.html

Add sddm user to the video group.

if not and and per Luebking's suggestion it is a (different) SDDM issue you could try a different display manager

not sure what is available in Fedora but to switch https://docs.fedoraproject.org/en-US/Fe ... sktop.html

3.1.1.2. systemd handles display managers
Switching display managers is no longer done by editing /etc/sysconfig/desktop. Instead use systemctl enable --force displaymanager.service to enable the installed display manager of your choice.

It said that user sddm already existed in video group.

For systemctl enable --force displaymanager.service if I type systemctl enable --force KDM.service (is that it?) I get Failed to execute: no such file or service.
But I used system-switch-displaymanager command and changed to KDM. Same.

Why I can run and see Calc "windowed widget"?

try changing the rendering backend used

in krunner run command

Code: Select all

kwriteconfig --file ~/.config/kwinrc --group Compositing --key Backend  Xrender && kwin_x11 --replace

or edit ~/.config/kwinrc and change the "backend=" line to Xrender

[Compositing]
AnimationSpeed=3
Backend=XRender
Enabled=true
GLColorCorrection=false
GLCore=false
GLPlatformInterface=glx

It didn't help. I didn't remember to check before, but I verified after the command that Xrender is there.