[Bug 59572] [845G regression] on Linux 3.7/3.8: LED monitor "Auto Adjust in Progress" 6-10 seconds at boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59572

--- Comment #9 from mlsemon35 at gmail.com ---
(In reply to comment #8)
> (In reply to comment #2)
> > Hmmm...maybe my questions should include "What happened to 8bpp?"
> 
> Yeah, I think that's the interesting thing here - the 10s delay for the
> screen adjusting seems to be annoying, but I don't see anything where the
> driver blocks for that long. This sometimes also happens in my own
> test-setups that the screen seems to take awfully long to adjust.
> 
> For the 8bpp support I've looked through git logs a bit, and it seems that
> we've parsed this always. So it's more likely that something in the 8bpp
> support broke (rarely tested unfortunately), and not that it never worked,
> but for some odd reason we've ignored that on 3.6 kernels. Git bisect of the
> 8bpp issue would be really interesting ...

Yes, boot time is unchanged, so the driver isn't waiting on the monitor, but
(rhetorically) what is it telling the monitor?

For 1024x768-16, my monitor has settled down like it has resigned to storing it
as a preset.  This problem is variable with kernel version, so I'll have to
start with 3.6.11 on a new partition and work my way up.  It's the best way to
get the requested intel_reg_dump for Chris, anyway.

I read about git bisects only yesterday and don't know how to do it yet.

The 8bpp fbcon worked without problem for kernels 3,2-3.6 on 845G, and 3.7
needs to be rechecked.  8bpp works without problem for kernels 3.6-3.7 for
865G.  I use 8bpp because it's about 50% faster than 16bpp on the 845G...and it
is baggage from using the old i810fb driver on i810.

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