X只能由root启动？？

cobranail

原来普通用户可以用startx启动X，装了nvidia的5336驱动之后就不行了，只有root可以启动X。普通用户使用startx的时候总是提示：
Fatal server error:
xf86OpenConsole: Server must be suid root

[quote:74eb223222="这是log："]
XFree86 Version 4.3.0 (Fedora Core 1: 4.3.0-42)
Release Date: 15 August 2003
X Protocol Version 11, Revision 0, Release 6.6
Build Operating System: Linux 2.4.21-2.ELsmp i686 [ELF]
Build Date: 24 October 2003
Build Host: porky.devel.redhat.com

        Before reporting any problems, please make sure you are using the most
        recent XFree86 packages available from Red Hat by checking for updates
        at http://rhn.redhat.com/errata or by using the Red Hat Network up2date
        tool.  If you still encounter problems, please file bug reports in the
        XFree86.org bugzilla at http://bugs.xfree86.org and/or Red Hat
        bugzilla at http://bugzilla.redhat.com

Module Loader present
OS Kernel: Linux version 2.4.22-1.2149.nptl.nAils ([email protected]) (gcc version 3.2.3 20030422 (Red Hat Linux 3.2.3-6)) #19 Thu Jan 29 14:28:22 CST 2004 P
Markers: (--) probed, (**) from config file, (==) default setting,
         (++) from command line, (!!) notice, (II) informational,
         (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/XFree86.1.log", Time: Sun Feb  1 12:58:03 2004
(==) Using config file: "/etc/X11/XF86Config"
(==) ServerLayout "single head configuration"
(**) |-->Screen "Screen0" (0)
(**) |   |-->Monitor "Monitor0"
(**) |   |-->Device "Videocard0"
(**) |-->Input Device "wacom"
(**) |-->Input Device "Mouse0"
(**) |-->Input Device "Keyboard0"
(**) Option "XkbRules" "xfree86"
(**) XKB: rules: "xfree86"
(**) Option "XkbModel" "pc105"
(**) XKB: model: "pc105"
(**) Option "XkbLayout" "us"
(**) XKB: layout: "us"
(==) Keyboard: CustomKeycode disabled
(**) |-->Input Device "stylus"
(**) FontPath set to "unix/:7100"
(**) RgbPath set to "/usr/X11R6/lib/X11/rgb"
(==) ModulePath set to "/usr/X11R6/lib/modules"
(WW) xf86ReadBIOS: Failed to open /dev/mem (Operation not permitted)

Fatal server error:
xf86OpenConsole: Server must be suid root


If you encounter a server crash, please report the problem by filing a bug
report in the XFree86.org bugzilla at http://bugs.xfree86.org and/or Red Hat
bugzilla at http://bugzilla.redhat.com/bugzilla.  When filing your report, it
is very important that you explain your problem in as much detail as possible,
and include a complete description on how to reproduce the problem.  After
submitting the bug report, attach the following files as uncompressed
individual file attachments using the bugzilla file attachment feature:
        - X server log file: /var/log/XFree86.1.log
        - X server config file: /etc/X11/XF86Config
        - Kernel log file: /var/log/messages
[/quote]
/dev/mem已经用chmod +666了