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SubjectRe: [announce] Intel announces the PowerTOP utility for Linux
Ondrej Zary wrote:
> On Tuesday 15 May 2007 02:13:15 Robert Hancock wrote:
>> Looks like the radeon driver has the same problem as the i915 driver
>> mentioned on the known problems page - I get 60 wakeups/sec from it on
>> my Compaq X1000 laptop (Radeon 9000 graphics) while in X, which
>> essentially prevents entry into C3.
>
> And Rage 128 too.
>

I have a Radeon 7500 in my laptop. The attached hack to disable the
VBLANK interrupt works for me. I don't know if it breaks 3D, I've only
tried 2D.

Michal
diff --git a/drivers/char/drm/radeon_irq.c b/drivers/char/drm/radeon_irq.c
index 3ff0baa..a990bb6 100644
--- a/drivers/char/drm/radeon_irq.c
+++ b/drivers/char/drm/radeon_irq.c
@@ -227,9 +227,8 @@ void radeon_driver_irq_postinstall(drm_device_t * dev)
atomic_set(&dev_priv->swi_emitted, 0);
DRM_INIT_WAITQUEUE(&dev_priv->swi_queue);

- /* Turn on SW and VBL ints */
- RADEON_WRITE(RADEON_GEN_INT_CNTL,
- RADEON_CRTC_VBLANK_MASK | RADEON_SW_INT_ENABLE);
+ /* Turn on the SW interrupt */
+ RADEON_WRITE(RADEON_GEN_INT_CNTL, RADEON_SW_INT_ENABLE);
}

void radeon_driver_irq_uninstall(drm_device_t * dev)
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