I have seen several remedies proposed for this bug, each of which seems to work for some people and not others.
I am running Ubuntu 16.10. I had the mouse problem recurring every few minutes, with the cursor moving normally but unable to click on anything. Sometimes I could click in one window and not another. Sometimes I could not click in any window, but the toolbar menu worked. I also have Windows installed on this computer. The bug never occurs in Windows. Upgrade BIOS to A05: No effect on the bug on my computer. Remove deprecated video driver: No effect on the bug on my computer. Install most recent version of non-free Nvidia driver, 367.57 0ubuntu3: Fixes bug on my computer almost completely. Workarounds: Switch console ctrl-alt-f1 and back ctrl-alt-f7. Mouse usually resumes normal action. Switch to Guest account and back using toolbar menu. Mouse usually resumes normal action. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1580692 Title: Dell latitude e6520 display freezes must reboot Status in firefox package in Ubuntu: New Bug description: 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 ;-) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1580692/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
