Re: radeonfb i2c regression post-2.6.18.

Roger Leigh
2007-11-21T14:26:48Z

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Benjamin Herrenschmidt <benh@kernel.crashing.org> writes:

> On Sun, 2007-11-18 at 21:58 +0000, Roger Leigh wrote:
>> Hi folks,
>>
>> I'm using an Apple Cinema Display connected via DVI to an Apple Mac
>> Mini with Radeon 9200 graphics. This used to work fine, but with
>> kernels >= 2.6.19, the monitor powers off as soon as the framebuffer
>> is initialised, making for a less than usable system. I've tested
>> with 2.6.(19|2[012]), and I didn't see any related changes in 2.6.23.
>
> .../...
>
> Can you try the patch from Jean that I pasted below and let us know if
> it helps ? It looks like the releasing of the i2c lines may have been
> done backward.

This patch fixes the problem. The monitor stays powered on during the
switch to the framebuffer.

Thanks,
Roger

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