[Bug 41762] New: radeon default power_profile "default" makes laptop overheat (Mobility Radeon HD 3650)

[bugzilla-daemon@freedesktop.org]

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

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