Booted computer, F9 boot menu, booted from Ubuntu 7.04 x86 Desktop CD-ROM. Good for office use at least: display works with correct resolution, mouse and keyboard work, network works, cdrom works. I did not hear any sound on boot, maybe dc7700 does not have built-in speakers. After installation, the image seemed sharper, even though resolution and refresh rate was exactly the same (as checked by pressing physical buttons on display): 1024×768@73Hz, where recommended is 1024×768@60Hz.
System: Administration: Restricted Drivers says this computer does not need any restricted drivers. According to machinotero/lshw, it has Intel integrated graphics adapter. Thus, desktop eye candy should work. Turned them on with System: Preferences: Desktop Effects: Enable desktop effects.