Resolution issues on i915GM w/ xorg-x11-drv-i810-

Philip Prindeville philipp_subx at
Thu Jul 13 15:29:10 PDT 2006

Philip Prindeville wrote:
> Charles Allen wrote:
>> Philip Prindeville <philipp_subx <at>> writes:
>>> Section "Screen"
>>> ...
>>>         SubSection "Display"
>>>                 Viewport   0 0
>>>                 Depth     24
>>>                 Modes    "1680x1050" "1280x1024"
>>>         EndSubSection
>>> EndSection
>> In trying to track down a similar problem with a 915G (Dell GX280) 
>> driving a
>> Dell 1703FP, it seems that it doesn't like the "Depth 24" line.  
>> Sticking in a
>> Depth of 16 works (32 doesn't, but that may be a video RAM limitation).
>> With Depth 24, this thing was convinced it was running at 1600x1200.  
>> With Depth
>> 16, it correctly ends up at 1280x1024.
> That's not the issue (I don't think).
> Because if I remove the "1280x1024", it works fine in 24-bit deep mode.

Grrr...  I mean if I remove "1680x1050", it works fine (in 1280x1024) mode
in 24-bits deep.  In other words,

Modes "1680x1050" "1280x1024"

results in a 1280x1024 h/w resolution with a virtual size of 1680x1050 (and
doing the ctl-alt-minus would not switch h/w resolution modes).

If I use:

Modes "1280x1024"

only, then it comes up at the right h/w resolution with the same virtual 

Very strange.


> For whatever reason, it's not preferring the 1:1 match of virtual size to
> actual physical resolution...
> And what was weird before is even though it said "Built-in mode 
> "1280x1024"",
> it wouldn't switch to that mode on ctl-alt-num_plus.
> Anyone else have any ideas?
> -Philip

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