Public bug reported:
I'm not sure exactly when this started as my /boot partition is only
mounted when I bring in a new kernel or major changes that require a new
initramfs (encrypted machine,special security needs), but the August 10
updates to Ubuntu Oneiric led to a black screen boot(no video output)
with encryption passphrase input also ignored. Plymouth could not even
accept the encryption password blindly, I had to either wait for Busybox
to show up, boot with splash and vt-handoff removed from the kernel
command line, or boot from an old kernel with a backup initramfs. Last
time this happened, in July, there was no video display but the
passphrase could be typed in blindly and was accepted.
If thel vt-handoff is removed from the kernel commandline but splash
kept, plymouth crashes, and the console shows an error saying plymouth
unexpectedly disconnected from (forgot the exact text). At that point,
Plymouth is again unresponsive and cannot enter the encryption
password(my script calls plymouth --ask-for-password directly).
If "splash" is removed from the kernel command line and the vt-handoff
is kept, the black screen error still occurs, just as in a default boot.
Only removing both splash and vt-handoff allows a responsive console or
any text output after KMS initialiization and before a failed boot would
bring up Busybox in the initramfs.
I have tested this in both the Intel Atom netbook and the AMD 4 core/ATI
graphics machines I have. Plymouth version is 0.8.2-2ubuntu25.
** Affects: plymouth (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/825439
Title:
Regression:Black screen/no video output is back in Oneiric as of
August 10
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