Comment 28 for bug 247003

"Me too".
     I upgraded from 8.04.1 for PowerPC to 8.10... on a well, it's a Frankenstein. 1250mhz G4 Windtunnel motherboard, but stuck into a Compaq SP750 case. Yeah.. kind of a prank. (When I was on vacation, my coworkers backed up my data, pulled the SP750 board, replaced the G4 with an identical 8.04 PPC setup, complete with proper USB adapter so I had the same IBM Model M keyboard hooked up and everything; they took bets on how long it'd take me to notice... about 4 hours. It was pretty obvious after I rebooted and heard the mac startup sound & Mac boot loader; otherwise, not obvious at all.)

Excerpt from Xorg.0.log.old, which is attached. The failsafe terminal works; I put on xfce4, which was super-stripped but a friend showed me how to add some menus and launchers; it doesn't crash either.
====================================
X.Org X Server 1.4.99.905 (1.5.0 RC 5)
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: Linux Ubuntu (xorg-server 2:1.4.99.905-0ubuntu5)
Current Operating System: Linux user-desktop 2.6.24-19-powerpc #1 Fri Jul 11 21:37:37 UTC 2008 ppc
Build Date: 01 August 2008 12:03:37AM
............
Backtrace:
0: /usr/X11R6/bin/X(xf86SigHandler+0x94) [0x10088c44]
1: [0x100344]
2: [0x10211c98]
3: /usr/X11R6/bin/X(xf86SetScrnInfoModes+0x1e0) [0x100b80f0]
4: /usr/X11R6/bin/X [0x100c23e8]
5: /usr/X11R6/bin/X(RRGetInfo+0xf8) [0x1014caa8]
6: /usr/X11R6/bin/X(ProcRRGetScreenResources+0x13c) [0x10151c2c]
7: /usr/X11R6/bin/X [0x101494ac]
8: /usr/X11R6/bin/X(Dispatch+0x4b0) [0x10047bb0]
9: /usr/X11R6/bin/X(main+0x43c) [0x100289dc]
10: /lib/libc.so.6 [0xf975b24]
11: /lib/libc.so.6 [0xf975ce0]

Fatal server error:
Caught signal 11. Server aborting
=======================================
And, relevant line from lspci -v:

0000:00:10.0 VGA compatible controller: ATI Technologies Inc Radeon RV250 If [Radeon 9000] (rev 01)
        Subsystem: ATI Technologies Inc Radeon RV250 If [Radeon 9000]
        Flags: bus master, stepping, 66MHz, medium devsel, latency 255, IRQ 48
        Memory at 98000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 0400 [size=256]
        Memory at 90000000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at f1000000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: radeonfb

     I just updated today, but I don't know how far behind the PPC builds are compared to regular. libgl1-mesa-dri is at 7.1~rc3.1ubuntu2 though.