Ubuntu 16.04 is live

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mfox
mfox's picture

No big surprise that Ubuntu 16.04 has some bugs. One of them affects my iMac. Since upgrading to 16.04 I have gotten freezes once or twice daily; whether running Unity, Gnome or Mate. I think that the freezes are connected to either suspension or the dual monitor setup, as there are bug reports on suspension, and my monitor setup is now run by the nouveau driver, which I hadn't used before. Bug reports suggest that the 4.6 kernel cures the problem, so for the first time I have installed a kernel other than what the distro comes with. We'll see if that helps; if not I'll change the driver next.

Mac user running Ubuntu 16.04 (Unity, Gnome) on Dell XPS 13 (4gb RAM, 250gb SSD)
Ubuntu 16.04, Chromixium, Remix OS and Crunchbang++ on upgraded 11.6" Acer 1810TZ Olympic Edition (4gb RAM, 240 SSD)
Ubuntu 16.04 on Mac mini, iMac & Dell 7020

jasonw

I had similar freezes (also on dual-monitor setup) with the latest nvidia driver. I tried it with nouveau and no problems. Then I went back to using the nvidia driver one earlier and it works out fine. So you may not be stuck with nouveau.

Jason

Computer enthusiast, beginner programmer, political geek.

mfox
mfox's picture

I think that you may have hit it, Jason, except that the freezes were with the nouveau driver, and when I went to install the latest driver (361.42) I got a blank screen as soon as I tried to boot it up. This was only with the second monitor attached; it booted fine when it wasn't attached. At any rate, I tried installing an earlier driver (340.96), and it starts up fine and also I can log out and back in with it (couldn't with new nvidia driver). So far, it seems to be behaving exactly the same as my setup with Ubuntu 15.10 did, which is to say OK. No freezes yet.

Mac user running Ubuntu 16.04 (Unity, Gnome) on Dell XPS 13 (4gb RAM, 250gb SSD)
Ubuntu 16.04, Chromixium, Remix OS and Crunchbang++ on upgraded 11.6" Acer 1810TZ Olympic Edition (4gb RAM, 240 SSD)
Ubuntu 16.04 on Mac mini, iMac & Dell 7020

jasonw

Interesting that nouveau caused you problems, too. It's a really basic driver.

Jason

Computer enthusiast, beginner programmer, political geek.

mfox
mfox's picture

Looks like I was too hasty in my conclusion. I can't start Ubuntu with the other Nvidia driver either. So I have what looks to be a problem with no good solution. Use Nouveau with dual monitor and get freezes or use Nvidia driver without second monitor. I can perhaps do the second and plug in the monitor afterwards, as long as I remember to unplug it before starting again. I'll have to look more carefully at the settings to see if this isn't creating the problem. Or maybe it will get fixed. I suspect that this is somehow related to either plugging in the second monitor in a Thunderbolt port, or treating the internal monitor as the primary.

Edit: Based on another thread I read on the internet, I'm now wondering if it has anything to do with my external drive plugged into the other thunderbolt port on my iMac. I'm going to disconnect it and see if I still get the freeze with the monitor plugged in.

Mac user running Ubuntu 16.04 (Unity, Gnome) on Dell XPS 13 (4gb RAM, 250gb SSD)
Ubuntu 16.04, Chromixium, Remix OS and Crunchbang++ on upgraded 11.6" Acer 1810TZ Olympic Edition (4gb RAM, 240 SSD)
Ubuntu 16.04 on Mac mini, iMac & Dell 7020

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