Ubuntu
linux-source-2.6.15 package

  1. Bug #63072
  2. Comment #6

Comment 6 for bug 63072

Revision history for this message
Joakim Larsson (joakim-bildrulle) wrote : Re: [R128] Dapper ppc install cd SIGSEGV initializing X on iMac

Ok, so I tracked down some differences from the dmesg logs between the two kernel versions and it seems apparent that a different framebuffer device driver is used in the live CD kernel. I attach the intalled kernel (2.6.15-23) log for reference against the already attached log from the live CD kernel (2.6.15-26) The interesting lines are:

< [ 0.000000] Linux version 2.6.15-23-powerpc (buildd@ross) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)) #1 Tue May 23 13:46:54 UTC 2006
> [ 0.000000] Linux version 2.6.15-26-powerpc (buildd@royal) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)) #1 Thu Aug 3 02:53:39 UTC 2006

and

< [ 32.329540] aty128fb: Invalid ROM signature 8181 should be 0xaa55
< [ 32.329568] aty128fb: BIOS not located, guessing timings.
< [ 32.329592] aty128fb: Rage128 RL AGP [chip rev 0x2] 8M 64-bit SDR SGRAM (2:1)
< [ 32.364369] Console: switching to colour frame buffer device 128x48
< [ 32.364402] fb0: ATY Rage128 frame buffer device on Rage128 RL AGP

> [ 65.884727] Using unsupported 1024x768 ATY,Rage128k at 94000000, depth=8, pitch=1024
> [ 65.919532] Console: switching to colour frame buffer device 128x48
> [ 65.919556] fb0: Open Firmware frame buffer device on /pci@f0000000/ATY,Rage128k@10

The live CD kernel uses some other device driver that isn't working with the UseFBDev option "true" as it seems.