[regression] Atom N550: Blank screen after booting kernel 4.4.0-145 or 146 or 148 or 150 or 151 or 154 (but 4.4.0-143 works)

[Tony Pursell]

Having run update on my i386 Asus Eee PC with Intel Atom N550 Dual core CPU running 16.04.06 LTS, it installed linux 4.4.0-145. If I boot this kernel everything is blank. Just a black screen. If I change to a terminal using Ctrl Alt F4 it is still a black screen but I can carefully type in my user name and password and then the shutdown command and it shuts down

Using Advanced options in grub neither the upstart or the recovery option work. The screen is still black. The recovery option does, however, display the boot sequence before going black.

I can boot the previous kernel 4.4.0-143 and all is OK.

[Tony Pursell (ajpursell)]

Please not that Launchpad has automatically assigned this bug to mutter, but mutter is not installed on the notebook in question, so I have added linux

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1824641

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Tony Pursell (ajpursell)]

Sorry I cannot collect log files for the kernel giving the bug. If I can collect any useful information using the kernel that does work, please let me know

[Tony Pursell (ajpursell)]

Attached is a syslog for the boot of 4.4.0-145 from start up to shut down in the way described above.

[Tony Pursell (ajpursell)]

Attached is Xorg log for the boot of 4.4.0-145

[You-Sheng Yang (vicamo)]

How about 4.4.0-144? Would it help to narrow down the issue a bit more?

https://launchpad.net/ubuntu/+source/linux/4.4.0-144.170

[Tony Pursell (ajpursell)]

An update with 4.4.0-146 has been installed and there is no fix in it. The screen is still blank.

[Tony Pursell (ajpursell)]

Another update to 4.4.0-148, still the same, screen still blank after booting,

[Tony Pursell (ajpursell)]

Another update to 4.4.0-150, still the same, screen still blank after booting,

[Tony Pursell (ajpursell)]

Another update to 4.4.0-151, still the same, screen still blank after booting, 143 still works.

[Tony Pursell (ajpursell)]

Another update to 4.4.0-154, still the same, screen still blank after booting, 143 still works.

[Tony Pursell (ajpursell)]

Update to 4.4.0-164 has cured this bug. I can now boot with this kernel and log in OK.