Re: Screen resolution in Jessie

[Dan Ritter <dsr@randomstring.org>]

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-