Re: Screen resultion on i865G

[Chris Boot <chris.boot@oracle.com>]

Chris Boot wrote:

> Helge Tore Høyland wrote:
>
> > Måndag 4. april 2005 16:10 skreiv Chris Boot:
> >  
> >
> > > Hi all,
> > >
> > > I've installed Sarge on a Dell Optiplex GX270 at work, and 
> > > everything is
> > > running great except I can't get a decent refresh rate in X. In windows
> > > I could set the resolution to 1152x867 (or something like that) with a
> > > 76Hz refresh rate which was kind on my eyes and gave me a decent amount
> > > of screen real-estate, but I can't seem to do this under X at all (nor
> > > even get past 60Hz at 1024x768).
> > >
> > > I'm using the i810 driver with agpgart and dri. I've tried with
> > > ModeLines as detected by Knoppix (which also fails to work at a decent
> > > res) and without (leaving X to auto-detect) without any difference. The
> > > only thing in my XFree86.0.log that sheds any light is the lines:
> > >
> > > (II) I810(0): Monitor EDID v2 checksum failed
> > > (II) I810(0): XFree86_DDC_EDID2_RAWDATA property may be bad
> > >
> > > lspci lists my graphics card as:
> > > 0000:00:02.0 VGA compatible controller: Intel Corp. 82865G Integrated
> > > Graphics Device (rev 02)
> > >
> > > My monitor is a Sun CM751U (or SUN0564 from DDC).
> > >
> > > Does anyone have any ideas? I'll provide my complete XFree86.0.log or
> > > whatever if need be.
> > >
> > > Many thanks,
> > > Chris
> > >
> > > Below is my XF86Config-4:
[snip]

> > > --
> > > Chris Boot
> > > bootc@bootc.net
> > > http://www.bootc.net/
> > >   
> >
> >
> > This might be a soloution to your trouble.
> >
> > Take a look at your XF86Conf-4, at the section "Screen". You have got 
> > the depths listed but you seems to not having the "modes" listed for 
> > the proeriate depths.
> >
> > It sould look somthing like this:(the section in my XF86Conf-4)
> > "
[snip]

> > "
> >
> > Swap my GeForce with your Generic Video Card and my ___:ffff with 
> > your Generic Screen.
> >
> > Beware! If your screen was autodetected, as it looks like, you have 
> > got a low HorizSync and VertRefresh rate. I am a bit unsure, but my 
> > screen is 30-70(HS) and 50-120(VR) and I am not alowed to have more 
> > than 1280x1024 at 60Hz, neither in linux or windows. It looks like 
> > your Windows has gone a bit far if you have had 1152x867 at 76 Hz. 
> > Try 1024x768 at 72Hz(or a bit more).
> > 72 Hz is the lower limit for your eye to registrating flickering. 
> > Everything above will look "solid".
> >
> > Helge Tore Høyland
> >  
> Hi Helge,
>
> I *had* added the Modes lines before, but I took them out in case it 
> wasn't exactly 1152x864. With them out the graphics settings can go 
> all they way up to 1600x1200@60Hz, but that's positively tiny! ;-)
>
> I tried fiddling with the VertRefresh / HorizSync and extended them to 
> values I found by searching google for my monitor, especially since I 
> found the following in my log:
> (WW) I810(0): Generic Monitor: Using default hsync range of 
> 28.00-33.00kHz
> (WW) I810(0): Generic Monitor: using default vrefresh range of 
> 43.00-72.00Hz
>
> I added these values:
> HorizSync       30.00-92.00
> VertRefresh     40.00-130.00
>
> I thought we were onto something but still no luck. Depite being 
> properly detected (see log snippets below), they don't work. 

[snip]

> At least now it seems I get a decent refresh rate (85Hz) at 1280x1024, 
> which will do me just fine, but I don't actually know until I get to 
> work tomorrow and have a real look. Would be nice to have 1152x864 
> though, since it's not too small...
>
> Many thanks,
> Chris
Yup, it's now running at 1280x1024 at 86Hz, so that's fine by me! I 
didn't even think the graphics chip could do that, but it's really nice.

Thanks for all the help!
Chris

--
Chris Boot
Industrial Placement Student
Honorary Linux & Web Guru
Email + OIM: chris.boot@oracle.com
AIM: bootc622
Phone: +44 118 92 45324
http://www.bootc.net/