20th February 2017, 16:22
Well I've googled a bit as well for you and found a few possibilities:
1. it can be a power supply issue, your power supply may not be giving the CPUs enough voltage, so it might be that your power supply is near end of life or you have too much peripherals attached for the power supply to handle
2. you motherboard may not be giving the CPU enough voltage, so your motherboard can be near end of life
3. since I think you have intel CPU, have you installed a package called intel-microcode? If not, please try it, it will not harm in any way, but enable the system to handle the intel CPUs properly
4. since Ubuntu 16.04, many people have started experiencing the same issue as you, there is an active bug opened with Ubuntu, last post was 22 hours ago - look here: https://bugs.launchpad.net/ubuntu/+sourc...ug/1530405
5. seems that people with Nvidia cards are having this issue, so even though you have switched to Nouveau driver, maybe I would experiment again with reverting back to proprietary Nvidia driver and checking for the lockups
6. there is a parameter that you can set, that will potentially enable to avoid the lockups - try to set it like this:
By default that parameter is set to 10 seconds. If you prolong it to let's say 120 seconds, it will maybe help. In any case, that behavior is definitely NOT normal and something IS going on there. And in any case, this is DEFINITELY not a Maui thing, I think that you would have similar issues with any other Ubuntu 16.04 derivative. You have to understand that Maui is ONLY the Plasma desktop environment, nothing else - everything else, below that, like graphics, kernels, hardware support etc. is purely related to the Ubuntu and stuff provided by Ubuntu, so whether it's Maui, Neon, Mint or anything else - all is equally impacted. So when you search, please search for stuff related to Ubuntu 16.04.
1. it can be a power supply issue, your power supply may not be giving the CPUs enough voltage, so it might be that your power supply is near end of life or you have too much peripherals attached for the power supply to handle
2. you motherboard may not be giving the CPU enough voltage, so your motherboard can be near end of life
3. since I think you have intel CPU, have you installed a package called intel-microcode? If not, please try it, it will not harm in any way, but enable the system to handle the intel CPUs properly
4. since Ubuntu 16.04, many people have started experiencing the same issue as you, there is an active bug opened with Ubuntu, last post was 22 hours ago - look here: https://bugs.launchpad.net/ubuntu/+sourc...ug/1530405
5. seems that people with Nvidia cards are having this issue, so even though you have switched to Nouveau driver, maybe I would experiment again with reverting back to proprietary Nvidia driver and checking for the lockups
6. there is a parameter that you can set, that will potentially enable to avoid the lockups - try to set it like this:
Code:
sudo echo 120 > /proc/sys/kernel/watchdog_threshBy default that parameter is set to 10 seconds. If you prolong it to let's say 120 seconds, it will maybe help. In any case, that behavior is definitely NOT normal and something IS going on there. And in any case, this is DEFINITELY not a Maui thing, I think that you would have similar issues with any other Ubuntu 16.04 derivative. You have to understand that Maui is ONLY the Plasma desktop environment, nothing else - everything else, below that, like graphics, kernels, hardware support etc. is purely related to the Ubuntu and stuff provided by Ubuntu, so whether it's Maui, Neon, Mint or anything else - all is equally impacted. So when you search, please search for stuff related to Ubuntu 16.04.