I’ll do my best to provide required details. If the info below is insufficient please let me know what else you may find helpful. If I cannot solve this problem I will have to jump off Manjaro to either OpenSuSE tumbleweed or MX Linux. Manjaro Deepin is my 1st Arch based distro, but had to chg to KDE due to its unreliability starting last year. MX Linux is great, but not a rolling release. I hate the hassle of OS upgrades which tend to break things I’ve installed after the OS.
After reading this thread, I set IPv6 to “ignore”, since I didn’t see a “disable” method option under network config. That thread also suggested turning off MAC randomization so I will try that next. I’m doubtful that is causing the lockups but may be related to breaking the network connection. Is the randomization performed multiple times while a connection is open or only when one is first established? If the later I don’t see how that could explain random disconnects.
Here is some general background:
1- I have this problem with all kernels, but it’s far worse with 5.x versions.
2- I have seen it with Manjaro versions 19 and 20, deepin, xfce and kde variants.
3- I have eliminated all hardware, vpn and isp variables, it’s definitely a an OS issue. Could be in Debian root, so I installed the latest OpenSuSE Tumbleweed and I do not see the problem with that OS .
4- I have another system with an old Fedora 23 kernel acting as a proxy to other Debian VMs and don’t see the problem there either.
5- The major symptom I’m seeing is random network connection dropouts, which often trigger a system lockup requiring reboot. At the very least it kills my VPN connection. System lockup or user session lockups are also occurring randomly but not very frequently. This seems to indicate a low level bug with a driver or in the kernel.
Hardware: Asus Ultrabook UX490. Uses a USB-C (Thunderbolt) dongle for wired network. I have used 2 different dongles, both stable no problem under OpenSuSE.
From KDE System Info:
Operating System: Manjaro Linux
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.73.0
Qt Version: 5.15.0
Kernel Version: 5.8.6-1-MANJARO
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-8550U CPU @ 1.80GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620