Re: [now bisected] i915: 2.6.36-rc2 hoses my Intel display

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On Mon, 23 Aug 2010 17:32:25 -0600, Jonathan Corbet <corbet@xxxxxxx> wrote:
> On Mon, 23 Aug 2010 23:36:55 +0100
> Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> 
> > Taking the patch at face value, the cause should be a mistake in error
> > handling. So the first step would be to identify which i2c_transfer()
> > failed.
> 
> OK, I tried it, but neither warning triggers.

Sigh, that sounds like I screwed the patch up instead.
Thanks.

> Don't know if it helps or not, but I tried booting with
> drm.debug=0x05.  The result was truly vast amounts of stuff like this:
> 
> Aug 23 17:20:59 bike kernel: m:drm_ioctl], pid=2032, cmd=0x6458
> nm:drm_ioctl], pid=2032, cmd=0x6458, nm:drm_ioctl], pid=2032, cmd=0x645
[snip]
> 
> The above is one line from the system log; I took the liberty of wrapping
> it for readability.  

Hmm, probably bailing out of the ioctl before hitting the newline.
drm.debug=0x4 should print the right information for this bug.

-- 
Chris Wilson, Intel Open Source Technology Centre
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