X Consumes constant 90-99% CPU usage

James Green jim at vardus.net
Mon Nov 20 02:55:17 PST 2000


Hi,
Don't know if this is the most useful thing to say, but a while back I was
subscribed to a couple of XFree86 lists - I remeber a discussion over
whether or not something that sounded pretty similar to this was an X bug or
not - maybe try the xperts at xfree86.org list.

Hope this helps

James

----- Original Message -----
From: J.Smith <temp201 at hotmail.com>
To: <lfs-apps at linuxfromscratch.org>
Sent: Sunday, November 19, 2000 9:02 PM
Subject: X Consumes constant 90-99% CPU usage


>
> Hi there.
>
>
> I just downloaded and installed XFree86 4.01 from sources. However, X is
> very slow. Since I have a Athlon 600, 128 MB, and a Matrox Millenium G400
> 32Mb, I decided it couldnt be slow hardware, and I ran 'top'. 'top' shows
X
> as using a constant 90-99% CPU usage. Even if I replace my window manager
by
> twm, X still uses 90-99% CPU, so its not my window manager. When I boot
into
> my Mandrake distro instead of LFS on the same system and run X from my
> Mandrake distro, it runs fine. So I guess its not faulty hardware either.
I
> recompiled twice to see if something went wrong there, and even went
through
> the trouble of downloading and installing the precompiled binarys from
> xfree86.org, but even that did not solve my problem. Only if I switch from
X
> to a virtual console using ALT-Fxx, does the cpu usage of X drop down
again
> to (almost) zero. And then as soon as I switch back to my X session, it
goes
> all the way back up again and stays there. I am running the mga driver
that
> comes with XFree86 401 and not the driver that Matrox supplies themselves
> for X.
>
> Does anyone know what could be going on here? I have no idea on where to
> start looking, or how to even start to troubleshoot this issue. If someone
> could give me a few pointers here, that would be greatly appreciated.
> Thanks.
>
>
>
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