I have the same problem too.
I ran glxgears for a long time then glxgears got hung. I looked into it and
found the 915 interrupt handler wasn't called, so
dev_priv->sarea_priv->last_dispatch is not updated anymore. However the ring
buffer works fine and the appropriate data had been written into the hardware
status page. The problem still happened after I unloaded/loaded drm module. But
this problem doesn't happen on another machine.
The following patch works fine for me (The IRQ is still disabled).
diff --git a/shared-core/i915_irq.c b/shared-core/i915_irq.c
index 5ff8788..b2905bb 100644
--- a/shared-core/i915_irq.c
+++ b/shared-core/i915_irq.c
@@ -331,8 +331,10 @@ static int i915_wait_irq(drm_device_t *
DRM_DEBUG("%s irq_nr=%d breadcrumb=%d\n", __FUNCTION__, irq_nr,
READ_BREADCRUMB(dev_priv));
- if (READ_BREADCRUMB(dev_priv) >= irq_nr)
+ if (READ_BREADCRUMB(dev_priv) >= irq_nr) {
+ dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);
return 0;
+ }
dev_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT;
Thanks
Haihao
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Sergio Monteiro
Basto
Sent: 2007年1月30日 0:36
To: Dominik Brodowski
Cc: [EMAIL PROTECTED]; [email protected]; [EMAIL PROTECTED]
Subject: Re: i915 trouble -- IRQ being disabled
anything related with this issue ?
https://bugs.freedesktop.org/show_bug.cgi?id=9200#c8
On Sun, 2007-01-28 at 22:14 -0500, Dominik Brodowski wrote:
> Hi,
>
> When I switch from the "X Window System Version 7.1.1" console to a
> terminal, IRQ 10:
>
> 10: 200000 XT-PIC-XT uhci_hcd:usb1, ehci_hcd:usb4, yenta,
> yenta, [EMAIL PROTECTED]:0000:00:02.0
>
> gets disabled (irq 10: nobody cared). The hardware is
>
> 00:02.0 VGA compatible controller: Intel Corporation 82852/855GM Integrated
> Graphics Device (rev 02)
>
> and I was able to "git bisect" it down to the drm patches which went in
> after 2.6.19 and before 2.6.19-rc1 got released.
>
> While I have some other issues related to that IRQ line (usb autosuspend
> can causes the IRQ 10 becoming disabled, too), this issue only appeared once
> the drm/i915 patches got merged, so I logically derive that this is a
> separate issue.
>
> Any ideas? Any debugging you want me to do?
>
> Dominik
>
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