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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Radeon HD 7770 GHz Edition] Cape Verde XT: DPM set state failed"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73788#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Radeon HD 7770 GHz Edition] Cape Verde XT: DPM set state failed"
href="https://bugs.freedesktop.org/show_bug.cgi?id=73788">bug 73788</a>
from <span class="vcard"><a class="email" href="mailto:step2back+freedesktop@gmail.com" title="Stepan Bakshaev <step2back+freedesktop@gmail.com>"> <span class="fn">Stepan Bakshaev</span></a>
</span></b>
<pre>I installed kernel from here
<a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-trusty/">http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-trusty/</a>
and try to change power_method by
<a href="http://xorg.freedesktop.org/wiki/RadeonFeature/#kmspowermanagementoptions">http://xorg.freedesktop.org/wiki/RadeonFeature/#kmspowermanagementoptions</a>
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# uname -a
Linux silverstone 3.12.0-031200-generic #201311071835 SMP Thu Nov 7 23:36:07
UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# cat
/proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-3.12.0-031200-generic
root=UUID=4d025cce-1bf0-466f-a5c3-501d3f548e70 ro quiet splash vt.handoff=7
radeon.dpm=1
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# echo
"dynpm" > power_method
bash: echo: write error: Invalid argument
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# echo
"profile" > power_method
bash: echo: write error: Invalid argument
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# cat
power_method
dpm
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# echo "high"
<span class="quote">> power_profile </span >
bash: echo: write error: Invalid argument
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# cat
power_profile
default
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# dmesg |
grep 'drm.*error'
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# cat class
0x030000
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# cat vendor
0x1002
root@silverstone:/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0# cat device
0x683d
There are no errors and no success in changing power_method. Where did I do
mistake?</pre>
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