<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - discrete radeon HD 6400M/7400M intense heating even though it's "off"" href="https://bugs.freedesktop.org/show_bug.cgi?id=67178#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - discrete radeon HD 6400M/7400M intense heating even though it's "off"" href="https://bugs.freedesktop.org/show_bug.cgi?id=67178">bug 67178</a> from <a class="email" href="mailto:tpo_deb@sourcepole.ch" title="Tomas Pospisek <tpo_deb@sourcepole.ch>"> Tomas Pospisek</a> <pre>So if I boot with "radeon.dpm=1" then, as allready described, the laptop uses "relatively little" power, and is faning off some heat continuously, even when I set: # echo "battery" > /sys/class/drm/card1/device/power_dpm_state Whether I do the following does *not* seem to matter: # echo IGD > /sys/kernel/debug/vgaswitcheroo/switch # echo OFF > /sys/kernel/debug/vgaswitcheroo/switch But if I boot *without* "radeon.dpm=1" then the laptop will stay cool without fans running out of the box using around 14W. The various settings will show this then: # cat /sys/class/drm/card1/device/power_method dpm # cat /sys/class/drm/card1/device/power_profile default # cat /sys/class/drm/card1/device/power_dpm_state balanced Weird that power_method would show "dpm" even though I have booted *without* "radeon.dpm=1" ?! When I then set: # echo "battery" > /sys/class/drm/card1/device/power_dpm_state Power consumption will drop even further to ~11W. The overal logic of all of this is evidently completely escaping me... 8-o</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>