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Thread: Error setting screen resolution in VirtualBox

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  1. #1
    Join Date
    Mar 2009
    Beans
    100

    Error setting screen resolution in VirtualBox

    Hi,

    Followed the wiki. Get this
    Code:
    david@david-VirtualBox:~$ xrandr -q
    Screen 0: minimum 64 x 64, current 800 x 600, maximum 32000 x 32000
    VBOX0 connected 800x600+0+0 0mm x 0mm
       800x600        60.0*+
       640x480        60.0  
    david@david-VirtualBox:~$ xrandr --newmode "1368x768_60.00"   85.25  1368 1440 1576 1784  768 771 781 798 -hsync +vsync
    david@david-VirtualBox:~$ xrandr --addmode VBOX0 1368x768_60.00X Error of failed request:  BadMatch (invalid parameter attributes)
      Major opcode of failed request:  140 (RANDR)
      Minor opcode of failed request:  18 (RRAddOutputMode)
      Serial number of failed request:  20
      Current serial number in output stream:  21
    david@david-VirtualBox:~$ xrandr -q
    Screen 0: minimum 64 x 64, current 800 x 600, maximum 32000 x 32000
    VBOX0 connected 800x600+0+0 0mm x 0mm
       800x600        60.0*+
       640x480        60.0  
      1368x768_60.00 (0x155)   85.2MHz
            h: width  1368 start 1440 end 1576 total 1784 skew    0 clock   47.8KHz
            v: height  768 start  771 end  781 total  798           clock   59.9Hz
    I also found this thread http://ubuntuforums.org/showthread.php?t=1880909 and have installed the virtualbox-guest* packages.

    Here is my graphics support
    Code:
    david@david-VirtualBox:~$ sudo lshw -C display
    [sudo] password for david: 
      *-display UNCLAIMED     
           description: VGA compatible controller
           product: VirtualBox Graphics Adapter
           vendor: InnoTek Systemberatung GmbH
           physical id: 2
           bus info: pci@0000:00:02.0
           version: 00
           width: 32 bits
           clock: 33MHz
           capabilities: vga_controller bus_master
           configuration: latency=0
           resources: memory:e0000000-e7ffffff
    There is no xorg.conf in /etc/X11 so not sure about the options to add a modeline to that file, as it does not exist.

    Ideas?

    Thx.

    David
    Last edited by olddave1; February 26th, 2013 at 11:39 AM. Reason: code format

  2. #2
    Join Date
    Mar 2009
    Beans
    100

    Re: Error setting screen resolution in VirtualBox

    Hi,

    No luck, I added a xorg.conf as below. Weirdly the login screen is 1368x768 but as soon as I login it reverts to 800x600 and that is the top resolution availalbe in the Display options.

    Here is the xorg.conf I added to /etc/X11 directory
    Code:
    Section "Device"
    	Identifier	"Configured Video Device"
    	Driver		"vboxvideo"
    EndSection
    
    Section "Monitor"
    	Identifier	"Configured Monitor"
    	Option		"DPMS"
    EndSection
    
    Section "Screen"
    	Identifier	"Default Screen"
    	Monitor		"Configured Monitor"
    	Device		"Configured Video Device"
    	DefaultDepth	24
    	SubSection	"Display"
    		Depth	24
    		Modes	"1368x768"
    	EndSubSection
    EndSection
    So it can display the correct resolution but something is overriding it and only displaying the 800x600 resolution.

    Ideas?

    Thx.

    David
    Last edited by olddave1; February 26th, 2013 at 11:38 AM. Reason: code format

  3. #3
    Join Date
    Mar 2009
    Beans
    100

    Re: Error setting screen resolution in VirtualBox

    In the end I was advised to remove my xorg.conf and reboot. Then use Ctrl key + F to go to full screen, that worked. No idea what was different to before when it didn't.

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