Ubuntu: Laptop freezes after connecting external monitor


I am running ubuntu 14.04 LTS.Each time I connect to external display at home/workplace, my laptop freezes and then I have to restart the entire system. Please guide me in order to avoid this unnecessary restart. Thanks

OS Type: Linux Release: Ubuntu 14.04 (trusty) Make-Model Name: HP-Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz Kernel: 4.5.3-040503-generic Graphics Card: Intel® Skylake ULT GT2


You are on Linux Kernel 4.5.3 which is no longer supported: (https://www.kernel.org/). I would recommend you move up to 4.8.10 which came out a few days ago and has been working well for me. Plus users of Cherry Trail on the infamous Bay Trail bug list said yesterday it is fixing problems for them: (https://bugzilla.kernel.org/show_bug.cgi?id=109051). You have an Intel Skylake which is also included in that bug report. I have an Ivy Bridge and also have side effects ever since my upgrade to kernel 4.4 used by Ubuntu 16.04

Other Intel Skylake posts that may interest you here in AskUbuntu are:

Enough links already you're killing me!!!

Steps everyone can take are to ensure Intel microcode is up to date. See the answer in the first link at top of page.

Steps you can take is to upgrade kernel from 4.5.3 (unsupported) to 4.8.10 which has good reviews / improvments:

cd /tmp  wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8.10/linux-headers-4.8.10-040810_4.8.10-040810.201611210531_all.deb  wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8.10/linux-headers-4.8.10-040810-generic_4.8.10-040810.201611210531_amd64.deb  wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8.10/linux-image-4.8.10-040810-generic_4.8.10-040810.201611210531_amd64.deb  sudo dpkg -i *.deb  sudo reboot  

I look forward to feedback and updating this answer as new information comes to light.

Thank you.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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