Lucid: Overheating due to no PM for ATI KMS
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned |
Bug Description
As you know the code in Lucid's -32 kernel doesn't have support for power management on ATI cards with KMS (which is default). This is not a problem for desktop users, but laptop users with beefy cards may run into severe overheating issues. I expect the forums to flood with these problems once lucid is final. I have experienced this on two (laptop) machines at home: GPU and CPU share a heatsink thus the CPU gets very hot too when idling. In one case this lead to the CPU (both are C2Ds) being constantly stuck at 800 MHz a few minutes after booting (Once it went over 75° or something like that), in the other case the CPU temps went up to 80° in idle even with the fans at full speed. Switching to fglrx OR a newer kernel and PM OR UMS and PM fixes this, but I feel KMS on ATI as a default is a bad decision right now. I hope this gets fixed with 10.10 as the PM code hits MMs kernel.
Most likely we won't be able to do anything about this bug (unless there's a kernel upgrade in one of lucid's point releases) so I guess the purpose of this bugreport is more or less to track this issue during the development of MM.
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Architecture: amd64
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100113)
Package: linux (not installed)
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=de_AT.utf8
SHELL=/bin/bash
Tags: lucid
Uname: Linux 2.6.34-rc5-klausi x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev sambashare tape vboxusers video
Hi Klaus,
Please be sure to confirm this issue exists with the latest development release of Ubuntu. ISO CD images are available from http:// cdimage. ubuntu. com/releases/ . If the issue remains, please run the following command from a Terminal (Applications- >Accessories- >Terminal) . It will automatically gather and attach updated debug information to this report.
apport-collect -p linux 570589
Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https:/ /wiki.ubuntu. com/KernelMainl ineBuilds . Once you've tested the upstream kernel, please remove the 'needs- upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs- upstream- testing' text. Please let us know your results.
Thanks in advance.
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