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I just got Ubuntu 15.10 installed on my mac machine. Initially everything works well.

Following the help.ubuntu.com tutorial on fixing the touchpad (for utopic), I installed a bunch of things and did some config. After that I restarted lightdm with

systemctl restart lightdm

which consequently did a reboot. But it got stuck at shutting down so I ended up forcing the shut-down. When I re-started it I kept seeing many lines of 

 [drm: intel_pipe_config_compare [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0)

while starting WPA supplicant in the process of starting Light Display Manager and was not able to boot into Ubuntu. I tried rebooting it many times but I was greeted by the same error.

enter image description here
(Click image to enlarge)

What is going on? Without reinstalling Ubuntu, is there a way to fix this?

Archy Will He 何魏奇
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2 Answers2

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After plugging in a usb keyboard and getting into tty2 with Control+ alt + F2 (since I couldn't produce alt and/or F2 output on the Macbook P keyboard), I tried purging & reinstalling xorg and lightdm as suggested in this post but to no avail.

So I decided to start removing everything I installed on Ubuntu before encountering this error.. and (finally!) I managed to boot into ubuntu again by getting rid of bcmwl-kernel-source for the wifi:

sudo apt-get remove bcmwl-kernel-source

Hmmm. Now I'd need to figure out why bcmwl-kernel-source is causing this error.

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Archy Will He 何魏奇
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  • I get the same lines in my dmesg, but don't have that package installed. See also https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1492764 – unhammer Apr 25 '16 at 19:49
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I have faced the same problem on my Lenovo laptop, every time my Ubuntu starts it shows this error and displays Ubuntu running in low graphic mode.

Then, after a bit struggling I am not getting the solution, so as a random thought I removed my latest installed softwares and My Ubuntu is back to work.

Steps I followed:

  1. When the error popped up, I pressed Ctrl+Alt+F3, it opened virtual terminal and I entered my login and password.

  2. Then used this command:

    history | grep install

    After this output showed, what all software packages I had recently installed. Mine showed fdlrx, xdm, openvpn.

  3. Removed those packages using:

    sudo apt-get remove fdlrx
sudo apt-get remove xdm
sudo apt-get remove openvpn
sudo apt-get remove bcmwl-kernel-source

    Last command, I take from this page only.

  4. Then rebooted the system using command using command:

    reboot
techraf
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Sukhbir
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