FX2800M - driver 260.19.44 - adaptive clocking not working
I run Opensuse 11.3 with KDE 4.5 on a Dell M6500 with a FX2800M video card and an i7 Q 840 processor. Kernel version is 220.127.116.11-0.7-default. More precise (uname -a):
18.104.22.168-0.7-default #1 SMP 2010-12-13 11:13:53 +0100 x86_64 x86_64 x86_64 GNU/Linux.
I installed nvidia's driver 260.19.44. Afterwards I noticed that adaptive clocking is not working.
The graphics card always (!) runs with maximum speed, i.e.:
graphics clock at 600 MHz, memory clock at 1000 MHz, processor clock at 1500 MHz.
The 4 possible performance levels are displayed though. However, an automatic clock frequency reduction does not occur at any time.
This is in strong contrast to a FX 1800M on a Dell M4500. There the graphics card adaptively reduces its clock rates down to the lowest level when no 3d applications or only KDE's 3D effects are running.
I can reduce the clock rates manually via enabling coolbits in xorg.conf and reducing the clock rates by hand in the nvidia settings panel.
However, even settings as
Option "RegistryDwords" "PowerMizerEnable=0x1; PerfLevelSrc=0x3333;"
in xorg.conf do not trigger an automatic adaptive clocking.
This is true also for beta driver 270.26.
Is this a driver problem or a defect of the graphics cards ?
Last edited by moenchmeyer; 03-09-11 at 05:26 PM.
Reason: added more info on kernel version and proc type