[Bug 59388] New: Not able to configure 800x600 resolution on SLED 11 SP2 using Intel Sandybridge GT1 driver.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59388

          Priority: medium
            Bug ID: 59388
          Assignee: chris at chris-wilson.co.uk
           Summary: Not able to configure 800x600 resolution on SLED 11
                    SP2 using Intel Sandybridge GT1 driver.
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: seahcw at sg.ibm.com
          Hardware: All
            Status: NEW
           Version: 7.4 (2008.09)
         Component: Driver/intel
           Product: xorg

Created attachment 73041
  --> https://bugs.freedesktop.org/attachment.cgi?id=73041&action=edit
Xorg.0.log

Hi, we are having a problem configuring 800x600 resolution display mode on the
following Intel display chipset on SuSE Linux Desktop 11 SP2. There are no
problems displaying on 1024x768 resolution. The kernel version used is the
default kernel provided by the distro (3.0.13-0.27-pae). For this testing, the
display used is a 15-inch display monitor.

On Windows 7, this chipset was able to display in both 1024x768 and 800x600.
Therefore we ruled out the possibility that this chipset only supports
1024x768.

VIDEO CHIPSET: 00:02.0 VGA compatible controller: Intel Corporation 2nd
Generation Core Processor Family Integrated Graphics Controller (rev 09)
Chip: 0 is -> Intel Sandybridge GT1        00:02:0 0x8086 0x0102 PCI intel

xrandr output shows only 1024x768:
    Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
    VGA1 disconnected (normal left inverted right x axis y axis)
    HDMI1 disconnected (normal left inverted right x axis y axis)
    DP1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 304mm
x 228mm
       1024x768       58.8*+

hwinfo --monitor shows only 1024x768:
    21: None 00.0: 10002 LCD Monitor
      [Created at monitor.95]
      Unique ID: rdCR.BD3eryRNcWA
      Hardware Class: monitor
      Model: "IBM 1024x768 LCD"
      Vendor: IBM "IBM"
      Device: eisa 0x0102 "1024x768 LCD"
      Resolution: 1024x768 at 60Hz
      Size: 304x228 mm
      Detailed Timings #0:
         Resolution: 1024x768
         Horizontal: 1024 1234 1370 1344 (+210 +346 +320) -hsync
           Vertical:  768  769  775  806 (+1 +7 +38) -vsync
        Frequencies: 65.00 MHz, 48.36 kHz, 60.00 Hz
      Driver Info #0:
        Max. Resolution: 1024x768
        Vert. Sync Range: 50-75 Hz
        Hor. Sync Range: 38-60 kHz
        Bandwidth: 65 MHz
      Config Status: cfg=new, avail=yes, need=no, active=unknown

Specifying "PreferredMode" "800x600" in /etc/X11/xorg.conf does not seem to
have any effect. The desktop still displays in 1024x768.

We have updated the kernel using the latest kotd version 3.0.57-10-pae and the
only difference we see is that the xrandr output explicitly supports 800x600

xrandr output, showing support for both 1024x768 and 800x600: 
    Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
    VGA1 disconnected (normal left inverted right x axis y axis)
    HDMI1 disconnected (normal left inverted right x axis y axis)
    DP1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 304mm
x 228mm
       1024x768       58.8*+   75.0     70.1     60.0  
       800x600        72.2     75.0     60.3  
       640x480        75.0     72.8

However, the results were same when we specified 800x600 in xorg.conf as per
previous testing. The desktop still displays in 1024x768.

Will attach the xorg.conf and Xorg.0.log

We are in the process of testing this on openSUSE 12.2 and will update this bug
accordingly when we have results.

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