Hi, I'm pretty new to Linux and my English isn't that good.

So far I installed the newest Version of ISO-Slackware and everything went right until I typed "startx" to start KDE. An error occured something like "fatal error: no screen found".

I'm using a Kyro II video-card and I assume that's the problem. Can someone describe how to install the right driver?

A quick google on your card appears that it is a fairly new card. It should at least run in VESA mode, most high end cards will. You might starting with the vesa default config that comes with Slack. The file is /etc/X11/XF86Config-vesa. Copy it to the XF86Config file.

cp /etc/X11/XF86Config-vesa /etc/X11/XF86Config
startx

Depending on your mouse device, it might require some tweaking. The file is confiured for a mouse on the device /dev/mouse and using the PS/2 protocol. The file also defaults to 1024x768 at 8 bit color depth. But if it works for you, then you change the default color depth as well. If you mouse uses the PS/2 port then the default setting should work.

I would think this should at least get X going until you can locate enhanced drivers if you desire. You could do a search here on LQ for "Kyro II" and see if anything turns up.

I typed the 2 lines as you said, but it has no effect.
I'm using a USB-Intelli-Mouse and i haven't configured yet, but if my card were detected properly and my mouse not, there would be a different screen at least...

If you are interested in attempting straight framebuffer mode I will provide directions below. I have seen some situations with LCD panels that the VESA modes are not able to detect the screens correctly even if the video card is supported.

Use the XF86Config-fb instead of the XF86Config-vesa file in the prior post.

Edit the /etc/lilo.conf file and look for a line that reads something like vga=normal. Change it to vga=791. Save the file and run just the "lilo" command to write the new config to the hard disk. Reboot and attempt to startx.

When you reboot, it should be at the console again but at a much higher resolution and I think it should have a Penguin in the upper left corner. If you have that now, then you are in framebuffer mode. Just use the XF86Config file above instead.

I am not sure exactly what hardware support is required by the kernel in regards to chipsets and agp support etc. If it doesn't work then it will probably require a kernel update to 2.4.19 or .20.

Good luck.