Hello, I installed Fedora Core 5 on my PC which has ATI Radeon X800 graphic Chipset.

When I start xwindow, it start with 800x600 and I can't change my xwindows resolution, so I installed ati-driver-installer-8.28.8.run.
After that rebooted, and startx again.

But xwindow doesn't start anymore, there is no message on screen and just black.

How can I fix this problem? Help me. I am a beginner.

Post your /var/log/XFree86.0.log file here (or /var/log/Xorg.0.log, if you've got a Xorg installed). All lines marked with EE or WW are errors and warnings. Somewhere should be an error.

Yes we need what Samotnik said and also tell us how you installed the ati driver?
Did you applied the /etc/X11/xorg.conf after the driver install?
Regarding that you have not been able to setup a higher resolution.
Did you choose a higher monitor? Standard is 800x600 so.. how should then the monitor be able to use for e.g. 1024x768?
So importanend Sections in your xorg.conf is also Display, Screen and Device.

Thank you!
I uninstalled the ati driver. Now I can see the Xwindow screen.
But I need to install ATI driver.

That was my mistake. I installed the driver as automatic option.
ATI installer support only two distributions,Red Hat and SuSE, as default.
So I need to build a package for Fedora core.

Now I used this command - sh ./ati-driver-installer-8.28.8.run --buildpkg Fedora/FC5 - for build a package but I got responses such as below

**************************************************************
Creating directory fglrx-install
Verifying archive integrity... All good.
Uncompressing ATI Proprietary Linux Driver-8.28.8.............................................................................................. .................................................................................................... .................................................................................................... .................................................................................................... ...........................................................................
==================================================
ATI Technologies Linux Driver Installer/Packager
==================================================
Generating package: Fedora/FC5
Please install an appropriate Linux kernel module build package.
Probably kernel-smp-devel in this case.
If you've compiled a custom kernel, make sure /usr/src/linux exists
and the source tree matches the currently running kernel.
Removing temporary directory: fglrx-install
*********************************************************

How can I install the driver correctly?

You need a kernel sources installed.
You should find a kernel source package (something like kernel-<your_kernel_number>-dev) and install it. It'll make a directory /usr/src/kernel-<number> and a link /usr/src/linux on it. If sources are installed now, make a soft link /usr/src/linux on them.

I installed kernel source such as below. But same messages were occured.
What should I do?

[root@Brianhost src]# ls -al
합계 44
drwxr-xr-x 5 root root 4096 9월 14 09:56 .
drwxr-xr-x 14 root root 4096 9월 11 15:42 ..
drwxr-xr-x 2 root root 4096 9월 13 12:58 ATI
drwxr-xr-x 3 root root 4096 9월 14 09:48 kernels
lrwxrwxrwx 1 root root 37 9월 14 09:56 linux -> ./kernels/2.6.17-1.2174_FC5-smp-i686/
drwxr-xr-x 7 root root 4096 9월 11 15:44 redhat
[root@Brianhost src]# ls linux/
Makefile arch crypto fs init kernel mm scripts sound
Module.symvers block drivers include ipc lib net security usr
[root@Brianhost src]# pwd
/usr/src
[root@Brianhost src]# uname -r
2.6.15-1.2054_FC5smp

It's becourse your sourses version (2.6.17-1.2174_FC5-smp-i686) didn't match your kernel version (2.6.15-1.2054_FC5smp). You need an exactly your sources.

I installed ati driver successfully and use xwindows in 1920X1200.

I installed "kernel-smp-2.6.17-1.2174_FC5" and "kernel-smp-devel-2.6.17-1.2174_FC5".
And then installed ati installer such as "sh ./ati-driver-installer-8.28.8.run --buildpkg Fedora/FC5" then it makes 4 files

ATI-fglrx-8.28.8-1.fc5.i386.rpm
ATI-fglrx-control-panel-8.28.8-1.fc5.i386.rpm
ATI-fglrx-devel-8.28.8-1.fc5.i386.rpm
kernel-module-ATI-fglrx-2.6.17-1.2174_FC5smp-8.28.8-1.fc5.i386.rpm

when I installed above 4 files, they request a "libstdc++" so I installed by using yum. After all They were successfully installed.

After that I type the 'startx', but xwindow didn't start and had an error.
"/usr/lib/xorg/modules/drivers/fglrx_drv.so: cannot restore segment prot after reloc Permission denied"

By Googling I found that it was a problem of selinux, so I edited /etc/selinux/config. I changed the line that said SELINUX=enforcing to SELINUX=permissive.

But 'startx' made black screen, there was an error message that "given depth (16) is not supported by fglrx driver" in /var/log/Xorg.0.log.

Then I edited /etc/X11/xorg.conf, from "DefaultDepth 16" to "DefaultDepth 24".

After all, everything work well.

Thanks.