I had a very serious problem with many freezes and spontaneous reboots. I wasn't sure if it was Ubuntu, or bad RAM, or something else. It did improve over time -- instead of daily reboots I've been getting them more like weekly, or even biweekly. I finally found out what it was: https://community.amd.com/thread/225795 I have an AMD Ryzen 7 1700X. This is a really nasty problem. When I discovered this bug info yesterday, I went into the BIOS and disabled C-states. That is supposed to help. I assume Linux kernel updates have also been helping because it has improved a lot in the past year. Maybe I'll be lucky and the nightmare will now be over. Who should I be angry at? AMD or the Linux kernel developers? This was such a horror story that I think I might never buy another AMD chip. Mike On Sat, 21 Oct 2017, Mike Miller wrote: > We discussed this a little back in July. I just want to say that the syslog > wasn't helping much. The crashes didn't seem to have much to do with what > was in the log. I never figured out where the problem was, but as I said in > my previous message, over the past three months it kept on improving. It > could go 3 days without a crash. I have now upgraded to Ubuntu 17.10, and > I'm hoping that fixes more of my problems. I was going to go back to 16.10 > LTS, but that looked like it would be a big hassle, so I was crossing my > finger instead, just hoping it would fix itself (not as crazy as it sounds, > right?). > > Mike > > > On Tue, 25 Jul 2017, Mike Miller wrote: > >> This was as serious as any BSOD. I was using chromium-browser and >> when I used the mouse to copy the URL, the whole system just froze. >> The mouse still moved on the screen at first, but nothing else worked, >> then the mouse froze too. I doubt it had anything to do with >> chromium. I couldn't use ctrl-alt-F1 and the machine seemed to >> disappear from the home network, so I couldn't even see it, never mind >> ping it or ssh to it. >> >> Here are the messages from /var/log/syslog (my machine is "taxa2"): >> >> Jul 24 17:02:49 taxa2 org.gtk.vfs.Daemon[2445]: fusermount: failed to >> access mountpoint /run/user/1000/gvfs: Permission denied >> Jul 24 17:02:50 taxa2 hud-service[2166]: #033[31mvoid >> DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*)#033[0m: >> "No such interface 'com.canonical.dbusmenu' on object at path >> /org/ayatana/bamf/window/67108867" >> Jul 24 17:02:54 taxa2 unity-panel-ser[2034]: menus_destroyed: >> assertion 'IS_WINDOW_MENU(wm)' failed >> >> That's what happened just as it got stuck. There was nothing for 25 >> minutes before that and nothing after that until I reset the computer >> and rebooted. >> >> Any ideas? Could it have anything to do with samba? (That was >> running, but nothing should have been accessing it at that time.) I >> was not using sshfs. >> >> Mike >> >