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Bug 564684

Summary: x11-drivers/nvidia-drivers >=350 makes screen soapy (dpi problem?)
Product: Gentoo Linux Reporter: dtr <presentmeaninvite>
Component: Current packagesAssignee: Gentoo Linux bug wranglers <bug-wranglers>
Status: RESOLVED NEEDINFO    
Severity: normal    
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard:
Package list:
Runtime testing required: ---
Attachments: ‘diff -u’ between logs from the currently started server (on 346.96-r1 drivers) and previously started (355.11-r2)
emerge --info nvidia-drivers

Description dtr 2015-11-02 07:14:56 UTC
Created attachment 415930 [details, diff]
‘diff -u’ between logs from the currently started server (on 346.96-r1 drivers) and previously started (355.11-r2)

When I restarted X after upgrading X server and all its modules (@x11-module-rebuild), I got soapy screen, like many vertical bars that made letters’ stems wider or thinner than they should be. I use Terminus as desktop font, so I can clearly see if the picture is wrong. I’ve tried to press the Auto button on my display that, as I remmeber, fixed the issue some years ago, but it didn’t help. I’ve made a picture with GIMP using its interlace filter to help the display calibrate itself, but it didn’t help either.

I’ve installed nvidia-drivers 358.09 and 355.11-r2 and both had this problem. Then I downgraded to 346.96-r1 and the problem has gone without even pressing the Auto button.

Of course I had removed the nvidia driver (and nvidia_modeset for newer versions that prevented it from being removed) between X server runs. Otherwise it wouldn’t even start, I suppose.

I haven’t find any interesting lines in the Xorg.0.log that could point at what the issue might be related to.

x11-base/xorg-server 1.17.4
sys-kernel/gentoo-sources 4.0.5
Comment 1 dtr 2015-11-02 07:15:49 UTC
Created attachment 415932 [details]
emerge --info nvidia-drivers
Comment 2 Jonas Stein gentoo-dev 2015-11-13 16:07:44 UTC
Thank you for your comprehensive report. To me it sounds like 
a bug in the software provided upstream or a misconfiguration in your system.
I suggest to discuss this problem on a related mailing list, forum or IRC channel. 

I will close this bug here, because I do not see a relation to the gentoo ebuild or the way gentoo handles this special software package. Please provide more information, if I am wrong.