Mathematica 5.2 display very slow

Bug #68404 reported by Roman on 2006-10-26
Affects Status Importance Assigned to Milestone
Brian Murray

Bug Description

Displaying any windows asociated with Mathematica is very slow in Ubuntu 6.10; worked fine in 6.06. The windows draw slowly (I can see them build up), and dragging a window across the screen maxes out the CPU while still being extremely jumpy.

While dragging a window across the screen, the CPU usage widget (system monitor in the status bar) does not update any more.

Caroline Ford (secretlondon) wrote :

Where did you get Mathematica from? I can't find it in universe.

It may be that it needs updating due to 6.10 having different libraries etc.

Roman (roman-191) wrote :

Mathematica is commercial software.

Roman (roman-191) wrote :

maybe related to bug #55841

HelmutPod (helmut-podhaisky) wrote :

I have the same problem, in particular [Alt]-[Tab] to suspend a mathematica window to the background takes about 4 seconds, even if the worksheet is completely empty.

The driver in the "device" section in my xorg.conf is "ati" (Radeon 7000/VE).

I have no trouble with any other kind of windows and also no trouble with Ubuntu 06.06.

Note that Mathematica comes with its own fonts which are installed automatically (which may be related to this problem).

Roman (roman-191) wrote :

my xorg.conf has a different driver:

Section "Device"
        Identifier "NVIDIA Corporation NV37GL [Quadro FX 330]"
        Driver "nv"
        BusID "PCI:5:0:0"

HelmutPod (helmut-podhaisky) wrote :

I have a NVIDIA card on my notebook.

Using "nv", the display is very slow.

But when I change to the binary "nvidia" driver (package nvidia-glx)
the problem disappears.

1) apt-get install nvidia-glx

2) edit xorg.conf

Section "Device"
        Identifier "NVIDIA Card"
        Driver "nvidia"
        # BusID "PCI:5:0:0"

But it doesn't work on my desktop because my Radeon 7000VE
doesn't seem to be supported by the binary optimized ATI driver.

Roman (roman-191) wrote :

Yes, that worked! But instead of editing xorg.conf, you can also run nvidia-xconfig. It's all described in the Ubuntu guide, at

HelmutPod (helmut-podhaisky) wrote :

Another problem I had using the nvidia driver are redraw errors
(repeated lines of junk below the cursor which disappeared by minimizing-maximizing the window). But for this a solution is to add

Section "Extensions"
         Option "Composite" "disable"

to xorg.conf as it is described at

Roman (roman-191) wrote :

Works like a charm. Thanks for the help!

Brian Murray (brian-murray) wrote :

This bug report is being closed due to your last comment regarding this being fixed with a configuration change. Thanks again for taking the time to report this bug and helping to make Ubuntu better. Feel free to submit any future bugs you may find.

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