I think I had the same problem on zesty. It started occurring AFTER I used nvidia-settings to switch to integrated intel graphics on a Dell XPS-15 9560 (GTX1050) and completely uninstalled nvidia drivers to get back to a working laptop.
Indeed it seems to happen while using chromium. My machine was nog completely crashed though, I could still ssh into it. But restarting X or even rebooting was impossible, I did need to force power off.
I installed the upstream kernel, to be precise: linux-image-4.12.0-041200rc3-generic_4.12.0-041200rc3.201705282131_amd64.deb
For about a day now the laptop is very stable and VERY cool. No fan noise and battery usage seems to be much better than ever before without nvidia drivers.
I think I had the same problem on zesty. It started occurring AFTER I used nvidia-settings to switch to integrated intel graphics on a Dell XPS-15 9560 (GTX1050) and completely uninstalled nvidia drivers to get back to a working laptop.
Indeed it seems to happen while using chromium. My machine was nog completely crashed though, I could still ssh into it. But restarting X or even rebooting was impossible, I did need to force power off.
I installed the upstream kernel, to be precise: linux-image- 4.12.0- 041200rc3- generic_ 4.12.0- 041200rc3. 201705282131_ amd64.deb
For about a day now the laptop is very stable and VERY cool. No fan noise and battery usage seems to be much better than ever before without nvidia drivers.
Can't wait to get this kernel fully supported.