Testing the current Lubuntu Jammy iso file (dated Dec 8) in a Toshiba Satellite Pro C850-19W with a generation 3 Intel i5 CPU in BIOS mode (alias CSM alias legacy mode), Swedish, using the whole drive. The drive was previously used with a GUID partition table, GPT, in UEFI mode and Lubuntu Noble installed successfully. Calamares finished successfully and the installed system works. (There is still a GPT on the internal drive.)
So installing in BIOS mode into this computer works. It is old (bought 2013) but newer than the c2d machine where the bug was found.
Testing the current Lubuntu Jammy iso file (dated Dec 8) in a Toshiba Satellite Pro C850-19W with a generation 3 Intel i5 CPU in BIOS mode (alias CSM alias legacy mode), Swedish, using the whole drive. The drive was previously used with a GUID partition table, GPT, in UEFI mode and Lubuntu Noble installed successfully. Calamares finished successfully and the installed system works. (There is still a GPT on the internal drive.)
So installing in BIOS mode into this computer works. It is old (bought 2013) but newer than the c2d machine where the bug was found.