Re: Screen resolution in Jessie (Solved)

[Gary Roach <gary719_list1@verizon.net>]

On 04/30/2015 05:47 AM, Dan Ritter wrote:
> On Wed, Apr 29, 2015 at 12:22:43PM -0700, Gary Roach wrote:
> > On 04/29/2015 09:47 AM, Michael Biebl wrote:
> > > Am 29.04.2015 um 18:28 schrieb Gary Roach:
> > > > I just upgraded to Jessie with no problems. I use a 24" 16x9 monitor.
> > > > With wheezy, there was a 1920 x 1080? mode that gave the correct aspect
> > > > ratio for the 16x9 screens. Jessie seems to only have the 4x3 1600x1200
> > > > mode. All of my circles are now elipses. Is there a solution to this
> > > > problem. Is there a different driver out there. I'm using the on board
> > > > video card  on my Intel DP55KG mother board. I am certain that I didn't
> > > > have this problem with Wheezy.
> > > Does /var/log/Xorg.0.log contain any warnings or errors?
> > > I assume you use the "intel" driver? Is xserver-xorg-video-intel
> > > correctly installed?
> > >
> > > What does xrandr -q say?
> > OK xrandr -v -q gives:
> >
> > xrandr program version       1.4.2
> > xrandr: Failed to get size of gamma for output default
> > Screen 0: minimum 640 x 480, current 1600 x 1200, maximum 1600 x 1200
> > default connected 1600x1200+0+0 0mm x 0mm
> >     1600x1200      0.00*
> >     1280x1024      0.00
> >     1280x960       0.00
> >     1024x768       0.00
> >     800x600        0.00
> >     640x480        0.00
> >
> > No 1920 x ? shows up. I re-installed xserver-xorg-video-intel using
> > Aptitude. Nothing changed.
> >
> > [    27.140] (II) VESA(0): Total Memory: 256 64KB banks (16384kB)
> You have two problems:
>
> 1. You are using the VESA driver instead of the intel driver.
> Change this by creating /etc/X11/xorg.conf and specifying the
> intel driver. Here's a skeleton:
>
> Section "ServerLayout"
> 	Identifier     "X.org Configured"
> 	Screen      	0  "Screen0" 0 0
> 	InputDevice    "Mouse0" "CorePointer"
> 	InputDevice    "Keyboard0" "CoreKeyboard"
> EndSection
>
> ection "InputDevice"
> 	Identifier  "Keyboard0"
> 	Driver      "kbd"
> EndSection
>
> Section "InputDevice"
> 	Identifier  "Mouse0"
> 	Driver      "mouse"
> 	Option	    "Protocol" "auto"
> 	Option	    "Device" "/dev/input/mice"
> 	Option	    "ZAxisMapping" "4 5 6 7"
> EndSection
>
> Section "Monitor"
> 	Identifier   "Monitor0"
> 	VendorName   "Monitor Vendor"
> 	ModelName    "Monitor Model"
> EndSection
>
> Section "Device"
> 	Identifier  "Card0"
> 	Driver      "intel"
> EndSection
>
> Section "Screen"
> 	Identifier "Screen0"
> 	Device     "Card0"
> 	Monitor    "Monitor0"
> 	SubSection "Display"
> 		Viewport   0 0
> 		Depth     24
> 	EndSubSection
> EndSection
>
>
>
> 2. (After you solve 1, this may go away) Your monitor's EDID
> information is not being picked up or interpreted properly by
> the card/driver. You should be able to override it with
> something like this:
>
> xrandr --output VGA1 --addmode 1920x1080
> xrandr --output VGA1 --mode 1920x1080
>
> -dsr-
Thank you everyone for the help. Dan, you finally tipped me to the real 
problem. There was no xorg.conf file in my system. After further 
reading, I learned that X doesn't use a configuration file any longer 
but generates one on the fly by probing the hardware on boot up. A 
configuration file is only needed if something strange is required. So I 
rebooted  my system and watched the boot messages very carefully ( some 
way to capture these - the real early ones - would be nice). An error 
message showed up saying that a firmware package for radeon 5400 series 
chip set was missing. With more digging around I found that when l did 
an -  apt-get install firmware-linux-nonfree xserver-xorg-video-radeon - 
and reboot the system the correct driver loaded. No more problem.

My wifes computer is the same  but her 4:3 screen doesn't show the 
problem, I may fix it anyway.

I wouldn't be surprised if there a lot of users out there that have the 
same problem but haven't detected it.

Gary R.