When using my new computer, it becomes very hot on the top. This is probably because the graphic card is running full speed. HW: 2011 27 inch iMac, smolt: http://www.smolts.org/client/show/pub_d9693c43-4ee8-4a8c-82a8-5332c6481f4d
PCI ID for the video chip is 1002:6720, which is supported in kernel-2.6.38.5-24 Boot the machine and then attach the file /var/log/dmesg (as a plain-text attachment.)
I can not see that file. I see a file called messages, is that the one?
(In reply to comment #2) > I can not see that file. I see a file called messages, is that the one? Looks like we don't create /var/log/dmesg upon boot anymore. Run the command 'dmesg' in a terminal, capture the output and attach that instead.
Created attachment 498375 [details] dmesg dmesg output
Linux version 2.6.38.5-24.fc15.x86_64 Some interesting ACPI messages: [ 0.432700] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored [ 2.431589] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored [ 2.698755] ACPI: acpi_idle yielding to intel_idle [ 6.820799] [Firmware Bug]: ACPI(GFX0) defines _DOD but not _DOS [ 6.823593] acpi device:03: registered as cooling_device4 [ 6.823619] ACPI Error: Evaluating _BCM failed (20110112/video-365) And radeon: [ 4.277989] [drm] initializing kernel modesetting (BARTS 0x1002:0x6720). [ 4.278122] radeon 0000:01:00.0: Invalid ROM contents [ 4.278218] ATOM BIOS: Apple [ 4.425832] [drm] Special thermal controller config [ 4.426976] [drm] radeon: power management initialized Can you see if cpufreq was enabled? Run the command: grep "" /sys/devices/system/cpu/cpu0/cpufreq/* and post the output if you get something other than an error message.
Unlikely to have anything to do with ACPI, and likely to have everything to do with our not having proper GPU power management.
Is that the kernel or the Xorg driver's responsibility?
$ radeontool --debug usage: radeontool [options] [command] --debug - show a little debug info --skip=1 - use the second radeon card reading RADEON_DAC_CNTL (58) is internal error Is this what is expected?
Still happens in latest kernel.
Note that applesmc fan1_min, fan2_min, fan3_min can be changed to higher values, so that this model does not become too hot (1400 is rather good).
Do you have any more info regarding on how to set fans? Right now the do not seem to become active at all.
echo 1400 > /sys/devices/platform/applesmc.768/fan1_min and so on. use sysfsutils (might be something else on redhat) to set it once and for all.
GPU power management problem confirmed : the computer is way cooler with fglrx than with radeon driver (sometimes more than 15°c cooler).
Yeah, I am running the fglrx now, much much cooler. Too bad it is much slower as well, and you get artifacts.
Does "echo mid > /sys/class/drm/card0/device/power_profile" help for you guys?
What does that command do? Does it change anything?
It changes the power profile to be "middle" for the first drm/graphics card.. Did you check which power profile you're using now? cat /sys/class/drm/card0/device/power_profile
Current power profile is "default" for me. Changing it to "mid" makes temperature go down within seconds.
On my laptop (HP Elitebook 8530p with radeon HD3650 graphics) the default power profile seems to be "default" aswell, and when I change it to "mid", the temperature goes down immediately. This is on stock Fedora 15 live CD with no fglrx.
Interesting related article: http://www.phoronix.com/scan.php?page=article&item=amd_radeon_powerm&num=1
Computer seems to become much cooler when set to low and mid.
class/drm/card0/device/power_method = dynpm is a good compromise, too
Also: Does "pcie_aspm=force" kernel cmdline option help for you guys? "The Leading Cause Of The Recent Linux Kernel Power Problems": http://www.phoronix.com/scan.php?page=article&item=linux_2638_aspm&num=1
I also have similar problem, but that workaround does not work: # LANG=C cat /sys/class/drm/card0/device/power_profile cat: /sys/class/drm/card0/device/power_profile: No such file or directory It is Packard Bell (Acer) notebook. With proprietary Catalyst driver it much more cold.
Isn't this just one of many duplicates of bug 682851?
comment #13 would suggest so.
I say this is not duplicate of 682851. The root cause of this problem is that instead of having dynamic power state on the GPU Fedora set it to the max power state. Maybe it would be better to set it to low on default in dynamic does not work? My fans does not start always but my computer gets pretty hot.
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