http://bugs.freedesktop.org/show_bug.cgi?id=21321
Summary: Vblank interrupt increase during 'dpms off'
Product: xorg
Version: 7.4
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Driver/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
QAContact: [email protected]
Radeon driver: 6.12.1 - Ubuntu Jaunty version
Using powertop to measure wakeups.
During normal mode, cpu enters c3-c4 states to save power.
Approx. 10 wakeups/s.
During screenblank this increases to approx 60/s.
running 'xset dpms force off'
Thus not letting the cpu enter c3-c4 states !
Hardware: Thinkpad T42, radeon 7500.
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