I've got a fairly new Asus X550CC laptop with up to date xubuntu 14.04 on it. I'm using NVIDIA graphics drivers version 343.13. From day one I installed xubuntu on this machine I've been getting these random freezes. All graphics stop updating and the mouse pointer stops moving. Initially I thought the whole machine froze but then I realised if I swtich to a non-X desktop and back again (ctrl+alt+f1 followed by ctrl+alt+f7) things start working again.

Does anyone know what is causing this or how to debug what's going on? /var/log/Xorg.0.log shows something like this after the desktop change trick:

[   928.549] reporting 4 5 7 53
[   928.585] reporting 4 5 7 53
[   958.726] (II) NVIDIA(0): Setting mode "NULL"
[   958.727] (EE) NVIDIA(0): Failed to initiate mode change.
[   958.727] (EE) NVIDIA(0): Failed to complete mode change
[   958.742] (II) intel(G0): switch to mode 1366x768@60.0 on LVDS1 using pipe 0, position (0, 0), rotation normal, reflection none
[   958.775] (--) synaptics: ETPS/2 Elantech Touchpad: touchpad found
  • I have the very same problem right now. I tried couple of other drivers but with no luck. Nouveau worked fine when logged in but it had problems during booting. – Sebastian Oct 16 '15 at 20:47

I think you should see this bug report. https://bugs.launchpad.net/ubuntu/+source/nvidia-prime/+bug/1220426

  • Thanks. Looks like it's an age old bug without a solution. I'll keep an eye on that thread. – kbrown Oct 25 '14 at 16:56
  • No, I don't think it's related, I don't see the Setting mode "NULL" in the attached Xorg.0.log over there. – Hi-Angel Apr 23 '16 at 12:13

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.