Trouble installing Lubuntu/Ubuntu on old laptop with Windows 10

I think I have an answer. See this link.

According to that link, your computer is probably booting in UEFI mode, and if you switch in the BIOS to CSM (alias BIOS mode alias legacy mode), the graphics will probably work for you. At least it did 8 years ago (with Ubuntu).

It turns out the option to change between UEFI and CSM was buried under a sub-menu that I didn't see at first. Changing it allowed Ubuntu to run. Thanks for you help!

I have a similar version of Toshiba, but with Intel CPU, and I think the UEFI/BIOS system is the same or similar:

• Press F12
• Select <Enter Setup>
• Select 'Advanced'
• Select 'System Configuration'
• Press the <Enter> key and get to the menu where you switch between UEFI and CSM Boot
• Press F10 to save the new setting and reboot