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Re: ColorFunction on a linux system (xorg) loses graphics

  • To: mathgroup at smc.vnet.net
  • Subject: [mg100095] Re: ColorFunction on a linux system (xorg) loses graphics
  • From: tom.kalvoda at gmail.com
  • Date: Sat, 23 May 2009 06:33:06 -0400 (EDT)
  • References: <gu3020$oka$1@smc.vnet.net> <gu6685$9vp$1@smc.vnet.net>

Dear all,

I had the same problem (running on Archlinux with Intel graphics).
Consulting my good friend google I found this discussion:

    http://ubuntuforums.org/archive/index.php/t-1136142.html

the trick that helped me is to add

    Option "AccelMethod" "uxa"

into the Device section of your /etc/X11/xorg.conf. Now I cen see the
output of Plot3D and also output of Curtis's example (which I did not
get prior the edit of xorg.conf). On the other hand, the rotation of
3D graphic in Mathematica works strange now - but this does not
trouble me much.

To conclude, it seems to me like problem with new x.org server (guys
in the discussion above have ATI graphic cards, so I guess it is not a
driver problem...). Looks like we have to wait for new version of
Mathematica...

On May 12, 9:08 am, Curtis Osterhoudt <c... at lanl.gov> wrote:
> Hi, Peter.
>
>    Thanks for that reply. I somehow didn't think to try the XLIB flag=
 again, as I thought that issue had been fixed in the later Mathematica bui=
lds (used to use it all the time). In any case, it doesn't seem to work for=
 me (3D plots still disappear except upon rotation, and ColorFunctions stil=
l cause blank output). As you say, it might be the opensource driver. AMD/A=
TI are having such problems that they no longer provide any new proprietary=
 drivers for their older cards -- it's causing headaches in the community, =
obviously.
>    When I try the XLIB... export, Mathematica shows many "holes" in t=
he Plot3D graphs, and the rotations are much slower and jerkier than usual.=
 I guess I'll just live with the state of things as they are now, until Mat=
hematica learns to work with the drivers, or the driver writers can agree o=
n a unified front (ha!).
>
>        Thanks again!
>                      Curtis O.
>
> On Monday 11 May 2009 04:26:07 am Peter Pein wrote:
>
>
>
> > Peter Pein schrieb:
> > > Hi Curtis,
> > > on an Ubuntu system I use a script, which calls Mathematica with para=
meters
> > > which let me use the mouse-wheel and the NumLock-key. Additionally it=
 sets the
> > > environment variable XLIB_SKIP_ARGB_VISUALS to 1, which removed probl=
ems
> > > similar to the one you describe. Maybe it is worth a try (the little =
utility
> > > "imwheel" has to be installed):
>
> > > petsie@leierkasten:~$ cat run-math
> > > #!/bin/sh
>
> > > # run-math.sh version 4
> > > # `-r' flag means don't use the "Configurator"
> > > # and pass wheel events to the root window
> > > #
> > > # Ensure a single instance of Mathematica with
> > > # the option `-singleLaunch'.
> > > # Allow the use of the NumLock key with the
> > > # '-primaryModifierMask' and '-secondaryModifierMask'
> > > # switches.
>
> > > MARGS="-singleLaunch -primaryModifierMask Mod1Mask -secondaryModifi=
erMask
> > > Mod3Mask"
>
> > > if `ps -C imwheel > /dev/null`; then
> > >    XLIB_SKIP_ARGB_VISUALS=1 Mathematica $1 $MARGS
> > > else
> > >    imwheel -r
> > >    XLIB_SKIP_ARGB_VISUALS=1 Mathematica $1 $MARGS
> > >    imwheel -kq
> > > fi
>
> > Oops... this works with the proprietary drivers for an ATI Mobility 347=
0
> > graphics card on a laptop, but not with the opensource radeon driver on=
 a
> > desktop workstation with a HIS x1050 graphic card??
> > Must be a bug in the OSS-Radeon-driver.
> > B.t.w.: compiz is installed on both computers.
> > Peter
>
> --
> =========================
==========
> Curtis Osterhoudt
> cfo at remove_this.lanl.and_this.gov
> PGP Key ID: 0x4DCA2A10
> =========================
==========



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