Hey Daniel. ""VT100 Pseudographic Mode" is a feature of Plymouth which is usually toggled by pressing Escape." I can reproduce this behavior without pressing ESC and am quite certain I did not repeatedly entered VT100 by accidentally pressing ESC every time I encountered this issue as the key is far away and obviously not used for anything in the passphrase - in addition, I can be more than certain as it is impossible I hit ESC by accident 30 times in a row in the particular event I stated where I restarted the machine 30 times to finally decrypt it.
I have stated how to reproduce this behavior: VT100 can be entered with AltGr + Q, and AltGr + Shift - atleast with a german keyboard layout. The evidence is the linked jpeg file that clearly proofs that VT100 mode is activated after performing the @ Symbol on a german keyboard layout by AltGr + Q. And this particular photo was created when testing, and while that I performed every key stroke carefully and "slow" (slow as in dedicated and not rushing from Key to Key like with conventional typing). So Im not sure what you mean by "So it's possible you've hit a combination that emits the escape sequence ^[" I was not pressing anything other than AltGr + Q in the particular linked jpeg. In that scenario I was far away from the ^ key or the AltGr + 8 combination to perform a [ symbol. I am also far away from these keys in my daily routine where I encounter this issue persistently. As stated, while testing to debug this behavior, I tried various C0/C1 control codes, like ^[, and non of them exited VT100 mode in the "initramfs" environment (the environment you see in the linked jpeg). I was not able to exit VT100 except of using AltGr + Shift: But this method is not 100% reproducible for me as it requires proper timing. Additionally, within the actual LUKS passphrase, you do not know if you are in VT100 or not due to the * characters in plymouth - so one can not assume after AltGr+Q/AltGr+Shift if he entered VT100 and needs to exit again before continuing with the passphrase. As mentioned, I have this issue with 2 machines and at least 3 different keyboards (internal and external), since Ubuntu 18!, with various fresh installs. So this behavior is reproducible and not some user error of accidentally having the unlikely combination of keys to enter VT100 or some altered system that causes the behavior. To repeat myself: It always occurs for me when AltGr + Q or (accidental) AltGr + Shift is involved. The later, AltGr + Shift, on the other hand is an "unlikely" accident of holding the Shift Key for too long as I need to capitalize the letter of my passphrase before of the @ symbol. Cheers -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2097231 Title: LUKS Passphrase: AltGr + Shift Triggers VT100 Pseudographic Mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/2097231/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
