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[yinan <cuiyinan@xxxxxxxxxx>]

I have not solve this problem yet. When I check the display driver, it gives the information that "display unlccaimed"
If I use "ctrl+Alt+F2" it gives the information that "The system is running in low graphics mode". Is there anyone has any idea about it? Thank you !

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https://bugs.launchpad.net/bugs/1520974

Title:
  bbswitch :No discrete VGA device found

Status in bbswitch package in Ubuntu:
  New

Bug description:
  Hi，

  My desktop works well this morning (Dell 8900, Ubuntu 15.04), but
  after I changed the display driver from Nvidia to another one. Then
  after restart, I cannot get to the log-in interface, the screen is
  stopped and giving the following information,

       Fsck from util-linux 2.26.2
       /dev/sda4: recovering journal 
       /dev sda4: clean 856185/59973632 files, 28101441/239880448 blocks
       [OK] Started Light Display Manager
           Starting Network Manager Script Dispatcher Service…
       [OK] Started Network Manager Script Dispatcher Service.
       [OK] Started Detect the available GPUs and deal with any system changes.
           Started Light Display Manager…
       [26.789662] bbswitch : No discrete VGA device found
       [26.817663] bbswitch: No discrete VGA device found
       [28.553772] bbswitch: No discrete VGA device found
       [28.585774] bbswitch: No discrete VGA device found

  I will be very appreciated if you can give any suggestions, Thank you
  so much in advance.

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