Tried 12.04 release update
I had 11.10 up and running, but as it was a little buggy, decided to give 12.04 a try last night. Load went fine using update-manager, reboot after update not so fine; hangs after 20s. The first time through, I saw the same issues with BT as others had seen with 12.04 beta, so renamed the start-up script added for 11.10 (to bcattach_srv-save). I also commented out the ath6kl entry in /etc/modules in the event networking was also an issue; same result. I took a movie of the boot screen, and have transcribed below (but since it was a movie, some text too garbled to decode).
Comments start with #; generic numbers by ##.######, ?? means I could not read this text clearly enough.
[ ##.######] init: Failed to create pty – disabling logging for job
# above spam pty line interlaces within output from init scripts; I’ll just refer to this as “pty spam”.
* Starting bluetooth daemon [ok]
* Starting ???/DNS-SD daemon [ok]
* Starting network connection manager [ok]
[ ##.######] init: Failed to create pty – disabling logging for job
* Starting load fallback graphics devices [ok]
* Starting Userspace bootsplash [ok]
* Stopping load fallback graphics devices [ok]
[##.######] msm_snd_dev_dec: Invalid session ID 0
[##.######] msm_reset_out: Resetting all devices
[##.######] Source device 0 is not TX device
[##.######] msm_dev_out: device freq = 45000
# characters garbled, but a little extra searching revealed this is likely the msm kernel bits
[##.######] platform pll_q6: failed ot locate q6.??t
# Above could be pil_q6
[ ##.######] init: Failed to create pty – disabling logging for job
# pty spam repeats
speech-dispatcher disabled: edit……. [ok]
saned disabled: edit …… [ok]
# At this point screen blanks, and only pty spam prints twice.
[ 19.######] init: Failed to create pty – disabling logging for job
# and again 2 minutes later, also twice
[ 140.######] init: Failed to create pty – disabling logging for job
[600.070176] lcdc_lg_panel_power: l10 DISABLE
# I assume this just means the display has timed out, since the screen blanks and you see:
[ 2368.586645] lcdc_lg_panel_power: l10 ENABLE
--------------------end of output ------------------------
Hope this helps you all in understanding what is amiss; not really a developer in skills, but know my way around Linux. Let me know if additional information is required as I have a little bandwidth this weekend to work on the issue[s].