[ltp] x31, dualview with xrandr and 1680x1050

[Alex Deucher]

On Dec 17, 2007 12:17 PM, come se fosse antani <antani@gmail.com> wrote:
> On Dec 15, 2007 8:47 PM, Alex Deucher <alexdeucher@gmail.com> wrote:
>
> > On Dec 15, 2007 2:55 AM, Toens Bueker
> >
> >
> >
> > <toens.bueker@lists0903.nurfuerspam.neuroserve.de> wrote:
> > > Hi *,
> > >
> > > at work I just received a new display. As I have just
> > > changed from crt to tft at home, I thought, I could do the
> > > same at work.
> > >
> > > At home I use a 19'' tft with 1280x1024 resolution. In
> > > order to get more desktop space, I use xrandr to use the
> > > lcd of the x31 and the tft in a dualview configuration:
> > >
> > >  xrandr --output VGA-0 --right-of LVDS --mode 1280x1024 --rate 60
> > >
> > > At the same time I've changed the Virtual setting in
> > > xorg.conf to (1024 + 1280 = 2304):
> > >
> > >  Virtual 2304 1024
> > >
> > > Everything works as expected. With a windowmanager, which
> > > supports xrandr (xmonad), windows can be moved between
> > > screens but can display different virtual desktops as well.
> > >
> > > Now the problem: Changing the virtual line taking into
> > > account the display size (1680x1050) of the tft at work, X
> > > no longer starts. The virtual line in question is
> > >
> > >  Virtual 2704 1818
> > >
> > > "X no longer starts" is probably wrong. Actually the lcd
> > > of the x31 becomes dark, but if I look really close, I see
> > > a dialog box (probably from gdm), but I cannot read the
> > > error message.
> > >
> > > Any ideas? Is there anybody out there, who uses an x31
> > > with a 1680x1050 tft in a dualview configuration?
> >
> > 2704x1818 =~ 19 MB at 4 bytes per pixel (depth 24) which is more vram
> > than the chip has.  If you are using depth 24, try switching to depth
> > 16 which will cut you down to ~9.5 MB.
> >
> Hi.
> Sorry for the thread hijacking.
> I have a thinkpad x40  and I think the video chipset is the same as the one
> in the X31.

It's not the same.  the x40 is intel based.

> How can I know the maximal resolution I can obtain in dual view?
> I don't care about depth (16 would be fine) but I'd like to use a 1440x900
> on external vga since on non-16:9 resolutions my external lcd sucks.

The intel driver works similarly to the radeon driver so the same
things apply (more or less).

Alex