Public bug reported:
Binary package hint: xserver-xorg-video-ati
Using freshly updated Jaunty.
Radeon driver generates more interrupts during screenblanks ('xset dpms
force off') than not.
Measuring with powertop 1.11 my hardware generates approx 10 wakeups/s .
When issuing the 'xset dpms force off' wakeups increases to approx 60/s.
This seems to be radeon driver generating vblank interrupts during dpms
off. Thus preventing the CPU to enter C3-C4 state.
=> increased powerconsumption during dpms!
Using repos opensource radeon driver.
Hardware: Thinkpad T42, Radeon 7500.
For more info read dri-devel list:
http://www.mail-archive.com/dri-de...@lists.sourceforge.net/msg37843.html
Not sure if any solution was found.
** Affects: xserver-xorg-video-ati (Ubuntu)
Importance: Undecided
Status: New
** Tags: dpms powerconsumption radeon regression vblank
** Description changed:
Binary package hint: xserver-xorg-video-ati
Using freshly updated Jaunty.
Radeon driver generates more interrupts during screenblanks ('xset dpms
force off') than not.
Measuring with powertop 1.11 my hardware generates approx 10 wakeups/s .
When issuing the 'xset dpms force off' wakeups increases to approx 60/s.
This seems to be radeon driver generating vblank interrupts during dpms
off. Thus preventing the CPU to enter C3-C4 state.
=> increased powerconsumption during dpms!
Using repos opensource radeon driver.
Hardware: Thinkpad T42, Radeon 7500.
+
+
+ For more info read dri-devel list:
http://www.mail-archive.com/dri-de...@lists.sourceforge.net/msg37843.html
+ Not sure if any solution was found.
** Tags added: dpms powerconsumption radeon regression vblank
--
[Regression] vblank interrupts increase during 'DPMS off'
https://bugs.launchpad.net/bugs/364639
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