I have a problem with my Ubuntu (14.04 LTS). My computer become crash after login (it took about 3-5 minutes to login). After that, It operated at very low speed.
The solutions I tried (and not working are) :
Reinstall Ubuntu (even a new version 16.04 LTS had the same problem).
Reboot and use boot repair USB disk ( It's fine after 1st reboot, but for the 2nd, 3rd, 4th ... The reboot stuck at login screen again)
Reinstall newest version graphic driver
My laptop details:
HP EliteBook 840
Processor: Intel® Core™ i7-4600U CPU @ 2.10GHz × 4
Graphics: Intel® Haswell Mobile
OS type: 64-bit
I took too much time in this issue, maybe somebody has a little insight, any help would be appreciated, thanks so much
