Hi.

This is my first time using Slackware, and first time posting to LQ.

I seem to have an issue using KDM / run level 4 and x DE. First time I log in it works fine, but if I log out and in, part of my windows is painted black (does not happen every time thought).
I also experienced screen to go black and unresponsive if I log out - into KDM. This happened twice in KDE 4 with desktop effects enabled (but not every time I think).
For now I just use startx from run level 3, without issues.

Is this a known issue?

Oh, and I installed Nvidia driver from nvidia.com: NVIDIA-Linux-x86_64-295.59.run.
My hardware: nVidia Corporation G98 [Quadro FX 370M] (rev a1).
Picture, click here.

Have a nice day.

I have seen this too with KDE (4.8 as well as 4.9-beta) and a Nvidia card using the binary driver. Only a reboot would solve this, so I guess it is a crash in the Nvidia kernel driver which causes this.

1 members found this post helpful.

It's a relief to know (sort of) that I am not alone about this. Thank you.

Linus: "nVidia: Fuck you!"
sorry for the offtopic, couldn't help it

"I wish everybody was as nice as I am" - Linus Torvalds

should be nice to have this in fortune

X-server restart (Ctrl+Alt+Backspace) should be enough. Also when it turns black try opening "NVIDIA X Server Settings" (from KDE --> Settings menu) and switching through the tabs in nvidia menu. Magically it fixes the issue.
There is also a workaround. See this post.

1 members found this post helpful.

Hmm. restarting the X server did not help in my case, but I did not check what happens when running the Nvidia tool.

That is a workaround in case the complete screen remains black. This is not the same as the issue described here.

Eric

I did not attempt to switch through tabs in nvidia menu, so I can't comment on that. But I tried the suggestion in the link* and it seems to help restarting X/KDM on every log-out. I've logged in and out multiple times and switching between DE, and I could not reproduce the errors this far.

Only annoyance is watching the NVIDIA logo over and over again because X is restarting, but that can be disabled some place.

Thank you.

PS: I enjoyed the talk by Linus on Youtube.

* edit /etc/kde/kdm/kdmrc and uncomment TerminateServer=true.

Yes, you're completely right, but it happens to work right for both issues. I've been searching for the right thread I choose the wrong one.
Here is the one I've been looking for. Thanks for pointing it out to me.

1 members found this post helpful.