Public bug reported: This is a fresh install of Ubuntu 16.04LTS 64 on a Dell Latitude E6520 laptop with an Intel core i7-2720QM (4 core) CPU, 8GB RAM and an NVIDIA N12P-NS2 video controller. The display freezes at random (I had this 10 times today with completely different apps running). The mouse still moves but the system does not react to clicks or keypresses (not even Ctrl-Alt-Del etc. and I can't access terminals at Ctrl+Alt+F1 etc.) It does not shut down gracefully when the power button is pressed. The system is however still active and can be accessed externally through SSH. The mouse and screen seems slightly less responsive than usual a few seconds before the freeze so that I can "feel it coming". However, it is hardly noticeable.
I noticed that the underside of the laptop is sometimes very hot when the display freezes, but it is not systematic, sometimes the freeze happens after the laptop had time to cool before booting and hasn't got hot yet. Until recently this laptop was running windows 7 64 pro without any problem. I have performed a full hardware test of the laptop (via setup) only a couple of days ago, there was no issue. I attached the output of dmesg and the Xorg.0.log file. This is not a critical system to me but I thought I'd report the bug for all intents and purposes, and I'd rather not reinstall windows on it if it can be helped ;-) ** Affects: firefox (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1580692 Title: Dell latitude e6520 display freezes must reboot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1580692/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs