Joseph,
Thank-you for all the good information about LCD's and this system
specifically.
I'll report back with my results.
Eric
Joseph Sinclair wrote:
> Eric Richardson wrote:
>
>> Hi,
>>
>> I trying to get Xwindows on Debian Sarge 3.1r0a working on a Dell
>> desktop and LCD 19"(I think) monitor. The Graphics chip is 82865G
>> with shared memory, I think :-(. The display is a Dell 2001FP with
>> AGP. I went throught the install and selected a few different
>> resolutions and got the following error.
>>
>> (EE) I810(0): No video BIOS modes for chosen depth.
>> (EE) Screen(s) found, but none have a usable configuration.
>>
>> I reduced the bit depth from 24 to 16 and now it is running at
>> 640x480 and 16 bit according to xwininfo.
>> I ran xvinfo and it reports 1440x 1080 max depth 16.
>>
>> I tried to run base-config again but I can't find the part that
>> configures X but I didn't move /etc/X11/XF86Config-4 aside first.
>> I started to run dpkg-reconfigure xfree86-xserver and stopped because
>> it was much more difficult than the install program.
>>
>> I'd like to start from the installer config as I figure I might have
>> selected something wrong such as sane pixels and bit depths.
>> I'm not sure what the program is in Sarge however.
>>
>> Also I don't understand LCDs well: do they only do a couple of
>> resolutions such as the 640x480 and the 1440x1080? Other people have
>> this setup running windows so I could see what there system will do.
>
>
> LCD displays have only 1 resolution, period, called the "native"
> resolution. All other (lower) resolutions are emulated by mapping one
> or more LCD pixels to 1 display pixel.
> It's always best to run an LCD panel at it's native resolution if
> possible, since the mapping process is imperfect, and often degrades
> image quality substantially.
> If you must run at a lower resolution, always try use integer
> factors. For example, if your system's native resolution is
> 1600X1200, then the next lower acceptable
> resolution would be 800X600, with exactly 4 LCD pixels mapped to each
> display pixel (800X1200 or 1600X600 would also work well, but few
> drivers support those
> resolutions).
>
> The reason CRT's can run at different resolutions effectively is
> because the blurring that normally occurs when the display phosphors
> interact with the electron beam
> compensates for the display artifacts that arise from emulating a
> lower resolution.
>
> According to the specs for your monitor (Dell 2001FP), you should set
> your system to 1600X1200 @ 60Hz.
>
> According to Intel, as long as you're running the latest (Dec. 29,
> 2004) driver for Linux, you should either let the driver figure things
> out, or declare 96M of Video Memory if it can't
> figure things out on it's own.
> The 865G uses system RAM for video memory, and dynamically
> allocates/deallocates as needed. Expect to see a reduction in
> available system RAM of around 64M most of the time.
> The chipset should support 1600X1200 @ 60Hz with 24-bit color without
> problems.
> Intel uses the i810 driver for all of their chipset drivers in Linux
> (they use a "unified" driver model), so don't worry if your 865G is
> identified as an i810.
>
>>
>> Since this is a shared memory graphics, do I need to do something
>> special? It reported 206844KB available. What does this mean?
>>
>> Any insight and help would be appreciated.
>>
>> Eric
>>
>>
>>
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