Bug#758178: screen resolution reverts to minimum when not selected by KVM

[remichael at comcast.net]

Tomasz, 
I finally got my OpenSUSE 13.1 running again, so I have some more 
information. 

When I type "gnome-shell --version" I get: 
GNOME Shell 3.10.1 

When I use yast and search for nouveau, I get: 
libdrm.nouveau2 2.4.46-3.2.2 
xorg-x11-driver-nouveau 1.0.9-3.1.2 

When I type "more /proc/version" I get: 
Linux version 3.11.6-4-desktop ( geeko at buildhost ) (gcc version 4.8.1 20130909 [gcc-4_8-branch revision 202388] (SUSE Linux) ) #1 SMP PREEMPT Wed Oct 30 18:04:56 UTC 2013 (e6d4a27) 

Bob Michael 

----- Original Message -----

From: remichael at comcast.net 
To: 758178 at bugs.debian.org 
Cc: "Nitecki, Tomasz" <tnnn at tnnn.pl> 
Sent: Friday, August 29, 2014 9:31:22 PM 
Subject: screen resolution reverts to minimum when not selected by KVM 

----- Original Message -----

Tomasz, 
I have 4 dmesg files attached. Two are at the start of a session, 
right before I switched the KVM to another machine. The other 
two are after a while when I switched the KVM back to this machine, 
found it in low res mode,and did another dmesg. The before and 
after files are identical except for an additional line in the after file 
that looks like this: 

[ 869.413400] [drm] nouveau 0000:05:00.0: no native mode, forcing panel scaling 

This happens for the Gnome desktop, and for the Gnome Classic 
desktop. I installed KDE and ran its desktop overnight and it did not 
go into low resolution mode even after more than 8 hours. I attached its 
dmesg file also, but there is only the before file since it did not go into 
low res mode. I loaded fvwm and ran it overnight and it did not go into 
low resolution mode either. 

I tried to ssh into this machine from a Debian 6 machine, but it failed 
to connect. I have not used ssh in 5 or 6 years and must not have something 
set up right. However, after a low res black screen, I was still able to ping 
the affected machine from a nearby Windows box. So it was still alive. 
But since I could not ssh into it, there was no way I could try to restart the 
X server. 

I am not sure how to get a gnome log. I found a program /usr/bin/gnome-system-log 
and ran it, which produced a window. I selected the text, and copied it to a file, 
which I have attached (gnome.log). It looks to me more like a system log than 
a gnome log. But it has 2 of the "panel scaling" messages in it. If there is 
another gnome log, perhaps you can tell me how to get it. 

I hope this information helps. If there is more you want me to try, let me 
know. 

When I type "gnome-shell --version" I get: 
GNOME Shell 3.4.2 
When I type "dpkg -l |grep nouveau" I get: 
ii libdrm-nouveaula:amd64 2.4.40-1~deb7u2 amd64 Userspace interface to nouveau-specific kernel DRM services -- runtime 
ii xserver-xorg-video-nouveau 1:1.0.1-5 amd64 X.Org X server - - Nouveau display driver 

This is running on an MSI Z87-G43 motherboard with an Intel i5-4440 CPU @ 3.10GHz 
with 16 GB of memory. 

When I type "more /proc/version" I get: 
Linux version 3.2.0-4-amd64 ( debian-kernel at lists.debian.org ) (gcc version 4.6.3 (Debian 4.6.3-14) #1 SMP Debian 3.2.60-1+deb7u3 

My openSUSE is on another disk so I will have to gets its version and send them later. 

Bob Michael 

----- Original Message -----

From: "Nitecki, Tomasz" <tnnn at tnnn.pl> 
To: 758178 at bugs.debian.org, "Bob Michael" <remichael at comcast.net> 
Cc: control at bugs.debian.org 
Sent: Friday, August 15, 2014 6:15:09 PM 
Subject: screen resolution reverts to minimum when not selected by KVM 

tag 758178 + moreinfo 
thanks 


Hey, 

Can you please provide us with some more details about your problem? 

1. Are there any suspicious messages in dmesg or gnome log after the 
screen resolution drops to 600x480? Can you please attach them both? 

2. Can you ssh to an affected machine after it black outs (that is after 
trying to reset the resolution)? If so, are there any error messages in 
dmesg or gnome log? Please attach them if you can connect. 

3. If you restart X server after the screen resolution drops, does it 
get back to normal? 

4. Did you (or can you) try if this problem also occurs while using any 
other desktop environment? 


Regards, 
T. 




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