My laptop is getting hot and the fan runs at abnormally high speed few seconds after I switch it on and before even getting into Grub (insecure boot text appears), the screen flickers at BIOS and Grub screen, it continues until the boot is complete. This happened after updating Ubuntu 14.04, I had to disable secure boot as per Virtualbox's DKMS request, at boot it now says: insecure boot and I can't change it . Recently, I updated the BIOS but didn't notice any issue.
Any suggestions ?
lspci -k | grep -EA2 'VGA|3D':
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
Subsystem: ASUSTeK Computer Inc. Device 11cd
Kernel driver in use: i915
--
01:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev a1)
Subsystem: ASUSTeK Computer Inc. Device 11cd
Kernel driver in use: nvidia
Laptop: Asus N550JV
Video adapter: dedicated Geforce 750M
OS: Ubuntu + Windows
lspci -k | grep -EA2 'VGA|3D'terminal command. – Pilot6 Aug 12 '16 at 15:51