[Bug 11062] New: Cannot setup resolution higher than 1024x768 on laptop with ATI Mobility Radeon card

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=11062

           Summary: Cannot setup resolution higher than 1024x768 on laptop
                    with ATI Mobility Radeon card
           Product: xorg
           Version: 7.2
          Platform: x86 (IA32)
               URL: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1159
                    68
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: bryce at bryceharrington.org
         QAContact: xorg-team at lists.x.org


On an ATI Mobility Radeon 9600 M10, xorg is not allowing higher resolutions,
perhaps due to failure to detect DDC properly on this card.  From the log:

(II) Loading sub module "ddc"
(II) LoadModule: "ddc"
(II) Reloading /usr/lib/xorg/modules//libddc.so
(II) RADEON(0): VESA VBE DDC supported
(II) RADEON(0): VESA VBE DDC Level none
(II) RADEON(0): VESA VBE DDC transfer in appr. 2 sec.
(II) RADEON(0): VESA VBE DDC read failed
(II) RADEON(0): DDC Type: 3, Detected Type: 0
(WW) RADEON(0): No valid DDCType is given for DDC2, try vbe probing ...
(II) RADEON(0): DDC Type: 0, Detected Type: 0
...
(II) RADEON(0): Validating modes on Primary head ---------
(II) RADEON(0): Panel ID string: 1024x768
(II) RADEON(0): Panel Size from BIOS: 1024x768
(II) RADEON(0): BIOS provided dividers will be used.
(II) RADEON(0): Total number of valid DDC mode(s) found: 0
(WW) RADEON(0): Mode 1280x1024 is out of range.
(WW) RADEON(0): Valid modes must be between 320x200-1024x768
(II) RADEON(0): Valid mode using on-chip RMX: 1024x768
(II) RADEON(0): Valid mode using on-chip RMX: 800x600
(II) RADEON(0): Valid mode using on-chip RMX: 640x480
(II) RADEON(0): Total number of valid FP mode(s) found: 3
(--) RADEON(0): Virtual size is 1024x768 (pitch 1024)

Oleksiy's report:
"The problem is: I cannot setup resolutions higher than 1024x768 on my SVGA+
laptop LCD neither using fglrx nor ati drivers. I have ATI mobility Radeon 9600
M10. I tried to investigate this problem by myself, and found, that VBE
incorrectly reports maximum resolution in c ase of fglrx and ati driver cannot
correctly read resolution data using DDC, even if ddcprobe reports correct
values. How can I skip validation of modes by VBE? Any other ideas?"


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