Robert wrote:
On Mon, 20 Oct 2008 10:38:39 -0700
Robert <[EMAIL PROTECTED]> wrote:

Greetings FreeBSD

When running XFCE4 I will lose the mouse pointer at times. This will
only happen when I have the driver set to "nv" in xorg.conf. The mouse
will still work as I can see where it is when I pass over icons and
watch them highlight. If I can stop on an icon, I can click and it

If I drop out of the XFCE4 using ctl-alt-backspace, the mouse pointer
appears and all is well. If I restart the XFCE4, there is no pointer.
If I change the driver to "vesa" and restart then I have a pointer
again. The only way I have found to regain the pointer using "nv" is
to reboot.

All ports are up to date and I am running amd64 RELENG_7 as of last

uname -a
FreeBSD asus64.shasta204.local 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE
#1: Sat Oct 18 13:31:00 PDT 2008
[EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC  amd64

If I should have posted to a different list please let me know. I have
also attached my xorg.conf.


> Five days and no responses, so maybe more information. On this computer
> I have on board GeForce 6100.
> [EMAIL PROTECTED]:0:5:0:   class=0x030000 card=0x81bf1043
> chip=0x024210de rev=0xa2 hdr=0x00 vendor     = 'Nvidia Corp'
>     device     = 'GeForce 6100'
>     class      = display
>     subclass   = VGA
> I have the same exact release and ports running on a different computer
> equipped with a GeForce 6800 XT in an AGP slot without a problem. The
> big difference is that other computer is running i386. It is using "nv"
> driver without any problems.
> Can anyone point me in the right direction. Feel free to tell me where
> to go. :-)
> Thanks
> Robert

This seems like a very strange problem.  Let's try focusing on XFCE first.

Are any processes conflicting with drawing something on the screen, from your description it seems like XFCE is a problem, but do other window managers do the same thing ?

If it's not wm specific then I'd try chasing down the developers of xf86-video-nv . Here is a starting point :

Does the driver support any sort of 'debug' mode that you could log to file ?


Taking a walk through xf86-video-nv, it looks like there are a few bitshift and & operators that use pointer and move things to and fro. ( in 64-bit land that maybe these moves should be handled differently ? Or are these magic numbers? )

Take a look into the source, nv_cursor.c

Examining these lines :
           #if X_BYTE_ORDER == X_BIG_ENDIAN
            if ( m & 0x80000000)
                *dst = ( b & 0x80000000) ? pNv->curFg : pNv->curBg;
                *dst = TRANSPARENT_PIXEL;

This case draws the pixel transparently if it fails the test -- which seems to coincide with what you're seeing. This is just a wild guess, it could be used elsewhere though with the same affect.

But then again, since this is working at all, then it may point to
        1. the wm
        2. Xorg may have a problem reporting it to the wm

Hope it helps.  Report back if you have any progress.

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