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Old 06-17-2012, 04:59 AM   #1
slack-jhh
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Nvidia and KDM/DE artifacts


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.
 
Old 06-17-2012, 05:23 AM   #2
Alien Bob
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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.
 
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Old 06-17-2012, 07:37 AM   #3
slack-jhh
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It's a relief to know (sort of) that I am not alone about this. Thank you.
 
Old 06-17-2012, 08:42 AM   #4
solarfields
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Linus: "nVidia: Fuck you!"
sorry for the offtopic, couldn't help it
 
Old 06-17-2012, 12:12 PM   #5
ponce
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"I wish everybody was as nice as I am" - Linus Torvalds

should be nice to have this in fortune
 
Old 06-17-2012, 12:27 PM   #6
alekow
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Quote:
Only a reboot would solve this, so I guess it is a crash in the Nvidia kernel driver which causes this.
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.
 
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Old 06-17-2012, 01:38 PM   #7
Alien Bob
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Quote:
Originally Posted by alekow View Post
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.
Hmm. restarting the X server did not help in my case, but I did not check what happens when running the Nvidia tool.

Quote:
There is also a workaround. See this post.
That is a workaround in case the complete screen remains black. This is not the same as the issue described here.

Eric
 
Old 06-17-2012, 02:39 PM   #8
slack-jhh
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Quote:
Originally Posted by alekow View Post
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.
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.
 
Old 06-17-2012, 04:34 PM   #9
alekow
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Quote:
Originally Posted by Alien Bob
That is a workaround in case the complete screen remains black. This is not the same as the issue described here.
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.
 
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