Public bug reported:
I have a Dell Inspiron 3521 with AMD/Intel hybrid graphics.
OS - Ubuntu 14.04.1 (Linux kernel 3.13.0)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Thames [Radeon HD 7500M/7600M Series] (rev ff)
sudo cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynOff:0000:01:00.0
Fan runs constantly, and battery backup is maximum 2 hours or even less
sometimes using the open-source drivers.
I have posted a similar info for xserver-xorg-video-ati because I found a bug
report #1304912.
But recently I installed fglrx drivers to see if I get better results and
changed the driver in use to Intel from the Catalyst-Control-Center.
The observation I made was that the problem persisted even when only the intel
drivers were in use.
So there could be problem with xserver-xorg-video-intel as the discrete
graphics card is shown to be dynamically off.
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
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which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1361209
Title:
Hybrid Graphics, overheating with fans running constantly
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