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Bug#641176: [bug?] Radeon 9200SE, memory overlapping

With Radeon 9200SE I'm not able to use X, apparently because its memory
can't be used.

With any kernel (tried 2.6.32, 3.0.0, 3.1-rc6) I will get dmesg lines
about overlapping.
[    0.073187] pnp 00:00: disabling [mem 0x000cd000-0x000cffff] because
it overlaps 0000:01:00.0 BAR 0 [mem 0x00000000-0x0fffffff pref]
[    0.073205] pnp 00:00: disabling [mem 0x000f0000-0x000f7fff] because
it overlaps 0000:01:00.0 BAR 0 [mem 0x00000000-0x0fffffff pref]
[    0.073223] pnp 00:00: disabling [mem 0x000f8000-0x000fbfff] because
it overlaps 0000:01:00.0 BAR 0 [mem 0x00000000-0x0fffffff pref]
[    0.073241] pnp 00:00: disabling [mem 0x000fc000-0x000fffff] because
it overlaps 0000:01:00.0 BAR 0 [mem 0x00000000-0x0fffffff pref]
[    0.073259] pnp 00:00: disabling [mem 0x00000000-0x0009ffff] because
it overlaps 0000:01:00.0 BAR 0 [mem 0x00000000-0x0fffffff pref]
[    0.073277] pnp 00:00: disabling [mem 0x00100000-0x1ffeffff] because
it overlaps 0000:01:00.0 BAR 0 [mem 0x00000000-0x0fffffff pref]
This happens always and then I can't use X. It will tell me that no
screens was found. System works fine with ATI Rage 128VR (32MB, PCI).
With 2.6.32 I get also: [drm] Detected VRAM RAM=0M, BAR=0M
and with 3.0.0: [drm] Detected VRAM RAM=128M, BAR=0M
3.1-rc6 doesn't seem to have anything about this. Otherwise they seem to
be correct.

System I used has Gigabyte GA-6BXE motherboard (rev 2.1, Intel 440BX
chipset) and VIA C3 (1 GHz, Nehemiah-core) in addition to Radeon 9200SE
(R92LE, 128MB). BIOS is the latest available from Gigabyte. OS is Debian
Wheezy with Experimental kernel (for testing).

I have already reported this to Debian as bug #641176.

Logs and stuff with 3.1-rc6 from Debian Experimental:
dmesg: http://pastebin.com/66k1syCf
lspci -vvxxx: http://pastebin.com/eqAQcCXy
/proc/version: http://pastebin.com/6ugdG8Fq
ver_linux: http://pastebin.com/MxpgGrmS
/proc/iomem: http://pastebin.com/155m5EzP
/proc/ioports: http://pastebin.com/WNHpmuCx
/proc/modules: http://pastebin.com/XSn90LLT
/proc/cpuinfo: http://pastebin.com/99Kd5Ady
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