[ltp] x31, dualview with xrandr and 1680x1050

come se fosse antani linux-thinkpad@linux-thinkpad.org
Mon, 17 Dec 2007 18:17:41 +0100


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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.
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.

thank you,
antani

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On Dec 15, 2007 8:47 PM, Alex Deucher &lt;<a href="mailto:alexdeucher@gmail.com">alexdeucher@gmail.com</a>&gt; wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Dec 15, 2007 2:55 AM, Toens Bueker<br><div><div></div><div class="Wj3C7c">&lt;<a href="mailto:toens.bueker@lists0903.nurfuerspam.neuroserve.de">toens.bueker@lists0903.nurfuerspam.neuroserve.de</a>&gt; wrote:<br>&gt; Hi *,
<br>&gt;<br>&gt; at work I just received a new display. As I have just<br>&gt; changed from crt to tft at home, I thought, I could do the<br>&gt; same at work.<br>&gt;<br>&gt; At home I use a 19&#39;&#39; tft with 1280x1024 resolution. In
<br>&gt; order to get more desktop space, I use xrandr to use the<br>&gt; lcd of the x31 and the tft in a dualview configuration:<br>&gt;<br>&gt; &nbsp;xrandr --output VGA-0 --right-of LVDS --mode 1280x1024 --rate 60<br>&gt;<br>
&gt; At the same time I&#39;ve changed the Virtual setting in<br>&gt; xorg.conf to (1024 + 1280 = 2304):<br>&gt;<br>&gt; &nbsp;Virtual 2304 1024<br>&gt;<br>&gt; Everything works as expected. With a windowmanager, which<br>&gt; supports xrandr (xmonad), windows can be moved between
<br>&gt; screens but can display different virtual desktops as well.<br>&gt;<br>&gt; Now the problem: Changing the virtual line taking into<br>&gt; account the display size (1680x1050) of the tft at work, X<br>&gt; no longer starts. The virtual line in question is
<br>&gt;<br>&gt; &nbsp;Virtual 2704 1818<br>&gt;<br>&gt; &quot;X no longer starts&quot; is probably wrong. Actually the lcd<br>&gt; of the x31 becomes dark, but if I look really close, I see<br>&gt; a dialog box (probably from gdm), but I cannot read the
<br>&gt; error message.<br>&gt;<br>&gt; Any ideas? Is there anybody out there, who uses an x31<br>&gt; with a 1680x1050 tft in a dualview configuration?<br><br></div></div>2704x1818 =~ 19 MB at 4 bytes per pixel (depth 24) which is more vram
<br>than the chip has. &nbsp;If you are using depth 24, try switching to depth<br>16 which will cut you down to ~9.5 MB.<br><font color="#888888"></font></blockquote><div>Hi.<br>Sorry for the thread hijacking.<br>I have a thinkpad x40&nbsp; and I think the video chipset is the same as the one in the X31.
<br>How can I know the maximal resolution I can obtain in dual view?<br>I don&#39;t care about depth (16 would be fine) but I&#39;d like to use a 1440x900 on external vga since on non-16:9 resolutions my external lcd sucks.
<br><br>thank you,<br>antani<br></div></div>

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