Re: [PATCH] Intel FB pixel clock calculation fix

On Tue 2007-09-11 14:18:57, Krzysztof Halasa wrote:

Andrew Morton [off-list ref] writes:

quoted

quoted

Intel framebuffer mis-calculated pixel clocks.

quoted

and... what are the consequences of this miscalculation?  I need to know
such things so that I can decide whether a change is needed in 2.6.23.  And
2.6.22.

The pixel clock (and thus both H and V sync) will be slower than
requested, so if you set the minimum allowed the display may not
sync. In case of really old CRT display it could theoretically
damage it.

I'm using it with PAL TV (using RGB input - SCART connector) and
the bug prevented it from working at all (TV requirements are more
strict and made the bug visible).

I think 2.6.22 would be overkill, .23 - not sure.

I don't think this is -stable kind of bug.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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