[Bug 529497] [NEW] drm: [radeon] no display; out-of-range resolution at Live CD boot

[TJ]

Public bug reported:

Starting x86 Ubuntu Live CD Alpha 3 on a PC equipped with an ATI Radeon
R200 the kernel mode-setting chooses a resolution the CRT monitor cannot
support, thus rendering the Live CD session unusable.

In order to capture the boot logging the PC was booted using PXE, TFTP
and NFS from a Lucid Alpha 3 image and the boot log captured via serial
port (by adding "console=tty0 console=ttyS0,115200n8" to the PXE kernel
boot options. (netconsole only captures fragments of the boot log -
another problem there I suspect).

[    5.036760] [drm] Radeon Display Connectors
[    5.041206] [drm] Connector 0:
[    5.044459] [drm]   VGA
[    5.047077] [drm]   DDC: 0x60 0x60 0x60 0x60 0x60 0x60 0x60 0x60
[    5.053432] [drm]   Encoders:
[    5.056615] [drm]     CRT1: INTERNAL_DAC1
...
[    5.250844] [drm] Initialized radeon 2.0.0 20080528 for 0000:01:05.0 on minor 0
[    5.261997] vga16fb: mapped to 0xc00a0000
[    5.266425] fb1: VGA16 VGA frame buffer device
[    5.330282] [drm] DAC-9: set mode 1280x1024 23
[    5.350943] Console: switching to colour frame buffer device 160x64

There are other issues with the drm failing in the attached log but this
one is the first that needs tackling.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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drm: [radeon] no display; out-of-range resolution at Live CD boot
https://bugs.launchpad.net/bugs/529497
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