15.04 do not boot starting version 219

[abdulqayyum]

I upgraded from 14.04 to 14.10 it was ok. I then upgraded to 15.04 using do-release-upgrade. Upgrade is complete as if I run it again in recovery mode. System return no recent upgrades. After upgrade I can not boot my system screen shows : Starting version 219
error usb file 'descriptor' not found (I think so) . I some time use recovery mode but that can not be for ever. How can I repair ? what is the cause? I have seen error 219 at many places but as I am new to linux ,only an year . so I am not aware of it. please tell me how to proceed next

Dual boot: I have another problem in 14.04 I was using Grub it upgraded so but during 15.04 upgrade I don't know how I selected lightdm. My win 7 is working well

Ram 4 Gb
Ubuntu 14.04 LTS to 15.04

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Martin Pitt (pitti)]

You should see the "grub" boot menu after a restart as it failed to boot. Please select "Advanced options", and start the entry marked with "(with upstart)". Does your computer boot again with that? If so, please attach the following files:

  /var/log/syslog
  /etc/fstab

and copy&paste the output of "sudo blkid" from a terminal. Thanks!

[abdulqayyum (askianfees)]

Here is fatal file

[abdulqayyum (askianfees)]

I have attached all three things you asked for. Moreover I was unable to boot from upstart, I used recovery mode 3.19 Linux. Please solve my problem. I forget to tell you, I have gnome kde cinnamon and xfce desktops. And exact wording of my error message is :
starting version 219
Error opening USB 'descriptor' file

[abdulqayyum (askianfees)]

Moreover as recovery mode open only TTYL. I can not do everything from terminal. I can not restrict myself to nano. I can enter gui using start. Which allows me to open terminal and chrome but not gedit. Except ls there is no way to access files. I can not use mouse except in nano scroll works! Sidebar and unity shell is not present. As in previous release I had kde that dominated and effected gnome and unity desktop. Turned boot to kde icon. So I found during file attachment in Gmail that file Explorer or nautilus icons all look like kde even though terminal and wallpaper is default unity. So I was curious about this. Moreover I was unable to find how to repair Ubuntu like it happens in Windows.

[Martin Pitt (pitti)]

Ah, so recovery mode works, but neither the standard nor the upstart boot entries work?

Your fstab looks as expected, but you didn't attach blkid; now you don't need to any more, recovery mode's log shows that this part was alright.

Can you go back to the grub boot menu, "e"dit the standard Ubuntu entry, go to the "linux" line, drop "quiet" and "splash", and then press Ctrl+X to boot that? This should give some more helpful screen output. Please do a photo of what happens, and when it stops doing anything.

[Launchpad Janitor (janitor)]

[Expired for Ubuntu because there has been no activity for 60 days.]