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Thread: Graphics problem: stuck at 640x480

  1. #1
    Join Date
    Apr 2006
    Location
    Seine-et-Oise,France
    Beans
    397
    Distro
    Ubuntu 12.04 Precise Pangolin

    Graphics problem: stuck at 640x480

    I'm trying to set up a computer for work. I have no control over the hardware; I need to set up this to run Windows XP in a VM, and it has to be off the network, so any updates beyond what are on the installation CD need to be downloadable and then installable from a USB stick or CD.

    The computer has the following graphics:
    Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 03)

    The monitor is a NEC LCD 175M capable of 1280x1024

    I've tried both 11.04 and 11.10 today, and neither give me anything but 640x480.

    When I try the the Preferences - Display I cannot change the resolution, cannot detect a monitor...

    I tried creating an xorg.conf file.

    Code:
    Section "Monitor"
            Identifier      "NEC 175M-BK"
            HorizSync       39-75
            VertRefresh     56-75
    EndSection
    
    Section "Screen"
            Identifier      "Default Screen"
            Monitor         "NEC 175M-BK"
            Device          "Configured Video Device"
            DefaultDepth    24
                 SubSection      "Display"
                    Viewport        0 0
                    Depth           24
                    Modes           "1280x1024"
                 EndSubSection
    EndSection
    "Driver can't support depth 24"

    Changed DefaultDepth and Depth to 16 and tried again.
    X server started, but 640 x 480 resolution.

    I looked in /var/log/Xorg.0.log and found a list of "Supported established timings" including
    1024x768@60Hz
    1024x768@70Hz
    1024x768@75Hz
    1280x1024@75Hz
    Also, monitor was identified as NEC LCD175M and its serial number was correct...

    I don't understand what's going on here; why the xorg log can identify the monitor, yet the GUI cannot...

    any ideas?

    K.

  2. #2
    Join Date
    Nov 2010
    Beans
    241

    Re: Graphics problem: stuck at 640x480

    Is the Intel driver loading, paste your Xorg.log in pastebin if you want us to look at it.

  3. #3
    Join Date
    Apr 2006
    Location
    Seine-et-Oise,France
    Beans
    397
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Graphics problem: stuck at 640x480

    OK. This is my first time at using pastebin... I hope it works.

    Here is the XOrg.0.log that was generated from my attempt at an xorg.conf file. That xorg.conf file looks like this:

    Code:
    Section "Monitor"
            Identifier      "NEC 175M-BK"
            HorizSync       39-75
            VertRefresh     56-75
    EndSection
    
    Section "Device"
    	Identifier	"Card0"
    	Driver		"intel"
    	Option		"Shadow"	"true"
    	Option		"DRI"		"false"
    	Boardname	"Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 03)"
    	BusID		"PCI:0.2.0"
    EndSection
    
    Section "Screen"
            Identifier      "Default Screen"
            Monitor         "NEC 175M-BK"
            Device          "Card0"
    
            DefaultDepth    8
                 SubSection      "Display"
                    Viewport        0 0
                    Depth           8
                    Modes           "1280x1024"
                 EndSubSection
    EndSection
    You'll notice I changed it a little from what I posted yesterday; I tried combining ideas from a couple of other threads, but got more or less the same bad results.

    If I delete the xorg.conf file, and allow the system to boot and X to start in the 640x480 resolution, I get this.

  4. #4
    Join Date
    Nov 2010
    Beans
    241

    Re: Graphics problem: stuck at 640x480

    You tried to force intel to load and it didn't work. The funny thing is there is no reason to be seen why it fails.
    As I suspected, you are running VESA generic driver right now, that's why only low res is available.
    The only thing I can think of is for some reason KMS is not enabled, starting with intel-2.10 or so KMS is mandatory.

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