Using the same 20230829 image I can't reproduce the bug on two ThinkPads that I've tried. After a fresh install the encryption passphrase prompt is displayed and works correctly in both cases.
However I am reminded of two known issues:
* Bug 2012698 which I assumed was caused by OLED panels because it didn't happen on any other machine I knew of.
* Historically some systems (sometimes) boot to the wrong VT (you just see a black screen) so require pressing Alt+Fn.
Using the same 20230829 image I can't reproduce the bug on two ThinkPads that I've tried. After a fresh install the encryption passphrase prompt is displayed and works correctly in both cases.
However I am reminded of two known issues:
* Bug 2012698 which I assumed was caused by OLED panels because it didn't happen on any other machine I knew of.
* Historically some systems (sometimes) boot to the wrong VT (you just see a black screen) so require pressing Alt+Fn.