Re: [Qemu-devel] How to get 1280x1024 display from guest running Xorg?

[Ben Taylor <sol10x86@cox.net>]

---- Robin Atwood <robin@binro.org> wrote: 
> This has been driving me mad! I have just installed Solaris 10 under Qemu and 
> specified the Xorg server to be used. I created xorg.conf with xorgconfig and 
> X started fine at 1024x768 using the Cirrus driver. When I edited xorg.conf 
> to specify a 1280x1024 display, the Xorg.0.log file showed "no mode". 

You may have to define HorizSync and VertRefresh in the xorg.conf file.

I have a nexenta alpha 6 with updates that just comes up in 1280x800 by setting
the HorizSync value in the xorg.conf.

> Now, I 
> have both Win XP and Plan 9 running at 1280x1024, so I booted up XP and poked 
> around the "Display/Settings" dialog and determined XP was running the 
> display at 1280x1024 at 43Hz interlaced and 16 bit colour. 

So you also need to define DefaultDepth in the xorg.conf file.

> So, using the 
> handy http://xtiming.sourceforge.net site, I generated a mode line like XP's 
> and added it to the xorg.conf file. X refused the interlaced mode so I tried 
> an uninterlaced one at 43Hz. That kind of worked but only rendered half the 
> screen! Everything else I tried got rejected as "bad mode..."

Since the virtual monitor doesn't specify EDID, it is unlikely to be able
to handle resolutions over the basic ones.  I know that a while ago (maybe
18 months) I was able to get something like 1156x864 out of the adapter
with early versions of Solaris express.
. 
> So does someone have a magic modeline or xorg.conf to get Xorg going in a 
> guest at high-res? There's another guy on the Linux-under-Qemu forum with the 
> same problem hosting Ubuntu. I am using qemu 0.9, FWIW.

Probably a combination of HorizSync/VertRefresh in the monitor section,
DefaultDepth in the Screen section, and a mode line, you might get what
you want. 

HTH,

Ben