Radeon/PowerPC: No video output after update 6.12.1 -> 6.12.99; 6.12.192

[Albrecht Dreß]

Hi all,

I'm new here, so please excuse me if this is a truly dumb question...

I run Linux (Ubuntu) on an old Power Mac with a Radeon card (see details below).  After the update from Ubuntu 9.04 (radeon driver 6.12.1) to 9.10 (radeon driver 6.12.99), X did not come up any more.  Instead of the X screen, the TFT shows single pixels, sometimes a blue vertical line, and a greenish shade in some regions of the display.  Switching back to the text console is impossible.  The system is still alive, though; I could reach it via ssh from an other box and reboot.  Using the "fbdev" instead of the "radeon" driver works (not accelerated, of course).

I could re-install the "old" 6.12.1 radeon and ati driver packages, which brought the accelerated X back to life.  I now updated Ubuntu to 10.04 Beta, coming with the radeon driver 6.12.192, ad it still shows the same "broken" effect (X log from this attempt is attached).  However, I now cannot re-install the old 6.12.1 driver any more due to missing dependencies.  Thus, any hints for a solution would be highly welcome!

Thanks in advance,
Albrecht.


My system is a PowerMac G4/800 "Quicksilver", ATI Radeon RV200 QW, Formac 17" TFT:

root at antares:~# uname -a
Linux antares 2.6.31-20-powerpc #58-Ubuntu Fri Mar 12 04:51:56 UTC 2010 ppc GNU/Linux
root at antares:~# cat /proc/cpuinfo
processor       : 0
cpu             : 7450, altivec supported
clock           : 799.999998MHz
revision        : 2.1 (pvr 8000 0201)
bogomips        : 66.43
timebase        : 33217816
platform        : PowerMac
model           : PowerMac3,5
machine         : PowerMac3,5
motherboard     : PowerMac3,5 MacRISC2 MacRISC Power Macintosh
detected as     : 69 (PowerMac G4 Silver)
pmac flags      : 00000010
L2 cache        : 256K unified
pmac-generation : NewWorld
Memory          : 768 MB
root at antares:~# lspci -v
[snip]
0000:00:10.0 VGA compatible controller: ATI Technologies Inc Radeon RV200 QW [Radeon 7500]
         Subsystem: ATI Technologies Inc Radeon RV200 QW [Radeon 7500]
         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 90020000 [size=128K]
         Capabilities: [58] AGP version 2.0
         Capabilities: [50] Power Management version 2
         Kernel driver in use: radeonfb

The file /etc/X11/xorg.conf looks as follows:

<snip>
Section "Device"
         Identifier      "Configured Video Device"
         Driver          "radeon"
         BusID           "PCI:0:16:0"
         Option          "UseFBDev"              "true"
EndSection
Section "Monitor"
         Identifier      "Configured Monitor"
EndSection
Section "Screen"
         Identifier      "Default Screen"
         Monitor         "Configured Monitor"
         Device          "Configured Video Device"
EndSection
Section "ServerLayout"
         Identifier      "Default Layout"
         Screen          "Default Screen"
EndSection
</snip>
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