Re: Radeon HD 5750 on Fedora 18 - airplane take off
On Fri, 2012-11-09 at 08:40 +0100, Mateusz Marzantowicz wrote:
I've just tried Fedora 18 Live desktop image. It's a big wow
and despite
some changes in gnome 3.6 which I'm not accustomed to everything seems
to work fine.
There is however some serious issue, that is also present in earlier
Fedora 17 release. It's about power management of graphics card. As
stated in title it's Radeon HD 5750 (Juniper) and open source driver.
When I started booting Fedora 18 I felt like I was in airplane that is
about to take off.
I've managed to fix this "bug" (or call I whatever you want) according
to instructions in
http://www.x.org/wiki/RadeonFeature#KMS_Power_Management_Options .
I have "profile" method set with "low" profile chosen it reduced fan
speed both on F17 and F18. I use rc.local to set it during boot up. My
question is: is it possible to set this by default in new Fedora 18? I
don't know if it could be done during compile time of kernel/drivers or
must be set explicitly like I did it. I think lot of people will be
happy to hear that GPU fan isn't so noisy.
We would not pre-empt upstream defaults for this sort of thing. Apart
from anything else, the Fedora X maintainers are heavily plugged into
upstream, so if our X folks thought it made sense to enable the PM code
by default, they'd already have changed that upstream.
I don't follow this closely, but from what I know, the PM code is still
fairly new and is not considered reliable enough to enable by default
yet. The safest setting is still to run the fans in airplane mode - it
may be noisy, but at least we're pretty sure we're not cooking your
GPU. :)
--
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
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