https://bugs.freedesktop.org/show_bug.cgi?id=41762
Summary: radeon default power_profile "default" makes laptop overheat (Mobility Radeon HD 3650) Product: DRI Version: unspecified Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: major Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: pasik@iki.fi
I'm using a laptop with Mobility Radeon HD 3650, and I've had overheating problems for a quite some time, with multiple kernel versions.
The issue happens at least with Fedora 14, Fedora 15 and latest Fedora 16 (beta).
As a default radeon power_profile "default" is being used, and it causes laptop overheating and emergency thermal shutdowns.. on a completely idle system! It seems the power management doesn't work with the opensource radeon driver on this laptop (HP EliteBook 8530p). See below for analysis and more info.
When I manually switch the radeon power_profile to "low" (see below) the temperature of the laptop decreases over 10 degrees celsius, making the laptop much cooler and also the fans will immediately slow down because the temperature goes down. Any idea why the "default" power_profile doesn't automatically run the card at lower engine/memory clock speeds?
Here's more information from Fedota 16 beta (x86_64) liveCD.. notice how the temperature goes down from 84C to 72C when switching to power_profile "low":
# cat /etc/redhat-release Fedora release 16 (Verne)
# uname -a Linux localhost.localdomain 3.1.0-0.rc6.git0.3.fc16.x86_64 #1 SMP Fri Sep 16 12:26:22 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
# lspci|grep -i vga 01:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3650
$ cat /sys/kernel/debug/dri/0/radeon_pm_info default engine clock: 600000 kHz current engine clock: 594000 kHz default memory clock: 700000 kHz current memory clock: 693000 kHz voltage: 1100 mV PCIE lanes: 16
# cat /sys/devices/virtual/thermal/thermal_zone3/device/path _TZ_.CPUZ
$ cat /sys/devices/virtual/thermal/thermal_zone3/temp 84000
# cat /sys/class/drm/card0/device/power_profile default
# echo low > /sys/class/drm/card0/device/power_profile
(wait for 5 mins.. and notice how fans slow down)
$ cat /sys/devices/virtual/thermal/thermal_zone3/temp 72000
# cat /sys/kernel/debug/dri/0/radeon_pm_info default engine clock: 600000 kHz current engine clock: 334120 kHz default memory clock: 700000 kHz current memory clock: 405000 kHz voltage: 900 mV PCIE lanes: 16
dmesg for the f16beta 3.1.0-rc6 kernel available here: http://pasik.reaktio.net/fedora/f16/radeon/f16-beta-laptop-radeon-dmesg.txt