[Bug 46578] [regression] 2.6.15-22-powerpc -> 2.6.15-23-powerpc: direct rendering gone missing with

[Herbert V. Riedel]

Public bug reported:

on my dec05 alu pbook 15", direct rending went missing when upgrading
from

linux-image-2.6.15-22-powerpc              2.6.15-22.34
to
linux-image-2.6.15-23-powerpc              2.6.15-23.39

lspci output:
0000:00:10.0 VGA compatible controller: ATI Technologies Inc RV350 [Mobility Radeon 9600 M10] (prog-if 00 [VGA])
        Subsystem: ATI Technologies Inc RV350 [Mobility Radeon 9600 M10]
        Flags: bus master, 66MHz, medium devsel, latency 255, IRQ 48
        Memory at b8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at f0000400 [size=256]
        Memory at b0000000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at f1000000 [disabled] [size=128K]
        Capabilities: [58] AGP version 2.0
        Capabilities: [50] Power Management version 2

the relevant differences in the bootup dmesg are:

-Linux version 2.6.15-22-powerpc (buildd at ross) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)) #1 Sun May 7 15:47:39 UTC 2006
+Linux version 2.6.15-23-powerpc (buildd at ross) (gcc version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)) #1 Tue May 23 13:46:54 UTC 2006

[..]

-[drm] Initialized drm 1.0.0 20040925
-[drm] Initialized radeon 1.19.0 20050911 on minor 0:
+[drm] Initialized drm 1.0.1 20051102
+[drm] Initialized radeon 1.24.0 20060225 on minor 0
 agpgart: Putting AGP V2 device at 0000:00:0b.0 into 1x mode
 agpgart: Putting AGP V2 device at 0000:00:10.0 into 1x mode
-[drm] Loading R300 Microcode
+[drm:radeon_do_init_cp] *ERROR* Cannot initialise DRM on this card
+This card requires a new X.org DDX


(see also Bug #45884, of which this bug is a continuation)

** Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

-- 
[regression] 2.6.15-22-powerpc -> 2.6.15-23-powerpc: direct rendering gone missing with 
https://launchpad.net/bugs/46578