Installing ChatGPT Desktop on Mint 20 / Ubuntu 20.04 — when the blocker isn't glibc
OpenAI shipped an official ChatGPT Desktop for Linux in August 2026 (preview), supporting Ubuntu 24.04/26.04, Debian 13, Fedora 43/44 and Arch. Mint 20.3 (focal, glibc 2.31) is nowhere on that list, so I expected a rerun of the Claude Desktop surgery.
It wasn’t. The glibc floor was fine all along — the package is blocked by three library renames and one optional TPM module. The fix is smaller, and the audit is worth showing because the conclusion is the opposite of last time.

