Radeon Power Management - no memory reclocking ?
morpheus at clantoc.org
Sun Jul 24 11:30:36 PDT 2011
It's my first message on this list, so I accept any advises/critics on
what I should do (or not).
I'm in the process of discovering Arch Linux on my laptop. At this time,
i should say it is probably my worst experience of a linux-based distro,
but also the best (learning is very interesting). In fact, my problem is
not Arch specific.
So on this laptop, I run a very old Radeon Mobility X700, with 128MB
dedicated VRAM. When I try to put the "low" power profile, I can see the
VPU frequency go down, but not the memory frequency.
I'm using only arch repositories' packages, but here are some details :
driver : xf86-video-ati 6.14.1
xserver : xorg-xserver 1.10.3
kernel 22.214.171.124 x86
KMS is enabled by default.
The Default (high) frequencies are 350/323 MHz for VPU/RAM, but on low,
it sticks to 102/323, where 105/120 are expected (values reported by
windows version of the Catalyst).
There's also what I consider a strange report from
/sys/kernel/debug/dri/0/radeon_pm_info. The PCI Lanes indicates "0" on
high profile, and "1" on low. I don't know whate it means.
Is there any trick I don't know about yet ? Or is the driver unable to
get the correct info from the vbios (very likely, this laptop is not a
complete linux friend) ?
As I said, I had tried once with some flavours of Ubuntu, and the result
was the same (I don't remember the exact version though).
I am ready to give you every additional info you could request, I write
here also to help others that have the same problem.
Thanks in advance,
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