I think Toshibas resume mode cannot keep all configuration data concerning the sound card. Sound playing works fine now. For example the latest driver I found on that site was packaged within 'ossfree38s9-linux20x.tar.gz'. Now setup a new kernel. Restart linux again.
Suggestions are welcome.
Use xf86config for creating your XF86Config-file and select the server for the CT65555 graphics card. Therefore you must install the svga server from your Linux distribution. After creating the XF86Config-file, you should make some little changes in the following section. Please have a look at the Toshiba Linux Utilities hompage, where you can find a lot of tools for Toshiba notebooks. I also want to thank H lio Guilherme and especially Rainer Wiener for their help with the sound card configuration.