Knoppix 8.3

[Capricorny]

Thanks. I don t know how to update if I only boot with my usb pendrive as it is, but good to know that this problem continues... I will continue with 8.1

If you have persistent store on the pendrive, you can just start Synaptic from the Preferences menu. In Synaptic, first press the Reload button, then choose the "Status" filter and select "Installed (upgradable)". You will then see the set of packages that may be upgraded. Never try to pick them all, but look at the graphics routines, typically modules associated with the X server. Mark them for upgrade, then choose Apply.

If you don't have persistent store on the pendrive - why not, really?