vblank interrupts increase during 'DPMS off'
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xserver-xorg-driver-ati |
Fix Released
|
Medium
|
|||
xserver-xorg-video-ati (Ubuntu) |
Fix Released
|
Medium
|
Unassigned |
Bug Description
Binary package hint: xserver-
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. Compiz disabled
Hardware: Thinkpad T42, Radeon 7500.
For more info read dri-devel list: http://<email address hidden>
Not sure if any solution was found.
Reproduce:
1. Disable compiz
2. On terminal: sudo powertop
3. On another terminal: xset dpms force off
Related branches
description: | updated |
Changed in xserver-xorg-driver-ati: | |
status: | Unknown → Confirmed |
Changed in xserver-xorg-driver-ati: | |
status: | Confirmed → Fix Released |
Changed in xserver-xorg-video-ati (Ubuntu): | |
status: | Incomplete → Confirmed |
summary: |
- [Regression] vblank interrupts increase during 'DPMS off' + vblank interrupts increase during 'DPMS off' |
Changed in xserver-xorg-driver-ati: | |
importance: | Unknown → Medium |
Changed in xserver-xorg-driver-ati: | |
importance: | Medium → Unknown |
Changed in xserver-xorg-driver-ati: | |
importance: | Unknown → Medium |
Please attach your xorg log and config. Also, what kernel and drm modules are you using?