I forgot to mention that I had done that stuff -- turning off the autolock. But there were many other oddities and it was clear to me that there was something wrong with the machine, so I returned it. I decided to just buy parts and have Nanosystems put them together for me. All parts are coming from Amazon Prime and almost all of them have free same-day delivery, which is nuts. But the case probably won't get here until Monday. I happened across this web page and I liked what he was doing: https://www.pcper.com/news/Processors/AMD-Ryzen-7-1700X-Selling-333 I'm not into gaming, so I cut back on the graphics card, ordering this one instead: https://www.amazon.com/gp/product/B0049MPQA4/ You might think that is disgraceful. ;-) But I doubled the SSD size to 500GB and ordered a mounting bracket (even though I might not need one)... SSD: https://www.amazon.com/gp/product/B00OBRE5UE/ mounting bracket: https://www.amazon.com/gp/product/B016498CK0/ ...and I also doubled the RAM, sticking with the fast 3000 RAM: https://www.amazon.com/gp/product/B0171GQHZC/ So I pay about 30% more, but I get a much more powerful system designed for my needs. Best, Mike On Wed, Jul 5, 2017 at 2:50 PM, Rick Tanner <rick at tanners.org> wrote: > On 7/5/17 10:46 AM, Mike Miller wrote: >> >> Does this sound like bad hardware? Or could it be some kind of driver issue? > > When your Ubuntu install is up and running, disable the Screensaver > and/or the auto-lock the desktop feature. > > Wait and see if this fixes your locking up/non-responsive issue. > > Later on, if you like, re-activate the Screensaver and auto-lock. > Disable it again if it proves to be problematic. > >> I'm also wondering what is the easiest way to get the old memtest86+. >> Didn't it used to be in the Ubuntu ISO? I thought it was there. I >> would have run it already if it was easily accessible. > > When booting, hold down the shift key and that should display the grub > menu. Is memtest of any version listed there? > > If not, try the Ultimate Boot CD > http://www.ultimatebootcd.com/ > > More references and discussion: > https://askubuntu.com/questions/917961/have-memtest86-in-the-installation-disk-menu-along-with-try-ubuntu > > _______________________________________________ > TCLUG Mailing List - Minneapolis/St. Paul, Minnesota > tclug-list at mn-linux.org > http://mailman.mn-linux.org/mailman/listinfo/tclug-list