Re: BCM4312 Fails when xdm is started

Yuval Hager
2008-12-07T09:30:26Z

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On Tuesday 25 November 2008, Peter Stuge wrote:
> Yuval Hager wrote:
> > I played around with different video drivers and the results are:
> > * If using the 'via' driver, I lose the PCIe card immediately upon
> > initialization
> > * Using the 'openchrome' (trunk version), It works well in the
> > beginning.
> > After first blanking the register reads are all 1's, and then
> > when the screen is blank I get a different read (some registers
> > are correct, some are wrong), and when the screen is unblanked, I
> > get 0xff's again. Very consistent and predictabe (same read every
> > time).
> > * Using the 'vesa' driver I could not recreate the problem. I could
> > not get the screen to blank for some reason, but closing the lid,
> > going on standby/hibernate, restarting X - all didn't matter much
> > to the PCI and the wireless card kept on working.
>
> Good work! You have beyond any doubt established that the X graphics
> driver can cause this problem.
>

This issue has been tracked down to be at the openchrome driver. It appears
that somehow it corrupted the PCI bus, and damaged the device right after the
video card - the wireless card.

The current workaround for this is here -
http://wiki.openchrome.org/pipermail/openchrome-devel/2008-November/000139.html -
but this is just a quick hack, not a fix, although it works great for me. The
openchrome team is working on a patch based on this.

Thanks for all the help - I am a very happy HP2133 user, and a very happy
community member. This was an amazing opensource support experience, which
I'll remember for a long time. Thank you all!

Cheers,

--
Yuval Hager
[@] yuval@avramzon.net

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