Radeon kernel driver power management bugs

Date: 2012-05-28 08:15 am (UTC)
From: (Anonymous)
Quote: "Second, we seem to have fairly significant trouble with Radeon hardware on a lot of Macs."

Also the radeon opensource driver in Linux kernel is quite broken regarding power management. On multiple non-Apple laptops the default radeon driver power_profile "default" makes the laptop overheat and do an emergency thermal shutdown. The "workaround" is to switch to using power_profile "low", but sometimes the machine will crash due to overheating before you even get to userspace to change that power_profile!

Upstream freedesktop.org bug about the broken radeon power management:
https://bugs.freedesktop.org/show_bug.cgi?id=41762

Fedora bugzilla entries about the broken radeon power management:
https://bugzilla.redhat.com/show_bug.cgi?id=714474
https://bugzilla.redhat.com/show_bug.cgi?id=733927

RHEL6 bugzilla about the broken radeon power management:
https://bugzilla.redhat.com/show_bug.cgi?id=770470

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Matthew Garrett

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Power management, mobile and firmware developer on Linux. Security developer at Nebula. Ex-biologist. @mjg59 on Twitter. Content here should not be interpreted as the opinion of my employer.

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