EDIT: Latest update

This is something so rudimentary that I'm a little embarrassed to ask, but I've also tried looking around online to no avail. One of the hard parts about being a Linux newbie is that the amount of support material out there seems to differ based on distro, DE, and also time, so posts from even a year or two ago can be outdated or inapplicable.

Here's my situation: I'm a newbie Linux user running Pop!_OS 19.10 with the GNOME desktop environment. Occasionally, games I'm playing will hard crash and lock up my system completely, leaving a still image of the game frozen on the screen indefinitely. The system stays there, completely unresponsive to seemingly any inputs. It doesn't happen often, but when it does it's almost always when I'm running a Windows game through Steam's Proton layer. I suspect it also might have something to do with graphics drivers, as I'll at times notice an uptick in frequency after certain updates, though that might just be me finding a suspicious pattern where none exists.

Anyway, what I don't know how to do is gracefully exit or recover from these crashes. No keyboard shortcut seems to work, and I end up having to hold the power button on my computer until it abruptly shuts off. This seems to be the "worse case scenario" for handling it, so if there is a better way I should go about this, I'd love to know about it.

EDIT: I really want to thank everyone for their help so far. My initial question has been answered, and for posterity's sake I'd like to post the solution here, to anyone who is searching around for this same issue and ends up in this thread:

• Use CTRL+ALT+F3/F4/F5/F6 keys to access a terminal, where you can try to kill any offending processes and reboot if needed.
• If that fails, use ALT+SYSRQ+R-E-I-S-U-B.

With that out of the way, I've added more information about the crashes specifically to the thread, primarily here, and some people are helping me out with diagnosing the issue. This thread is now less about the proper way to deal with the crash than it is about trying to identify the cause of the crash and prevent it in the first place.

I will be releasing a beta version of Intergrid in the near future, before New Year.

The first thing I need is someone to buy a domain name from.

I'm looking for a reasonable yearly price for the common generic TLDs ($10~$20), combined with reliability of support.

The only previous experience I had was with GoDaddy, and I had no issues with them. I have, however, heard stories of terrible support service (which I never used, for lack of need), and I'd rather not support a company of that level of service. (Nevermind that I bear strong dislike for post-service spam.)

The second thing I need is someone to host it.

Ideally, I would host it on a personal server, which would probably be a Pi-like platform, because I like the idea of owning the host as far as personal projects are concerned. I have little idea of how viable it is, or whether it's a better option for me than renting server space at the moment.

Lacking that, I'd like to have a EU-based hosting provider with reasonably-cheap ($10~$15) basic-level plans. Since the beta of Intergrid is local-storage-only, having a database hosted or supplied is not an issue at the moment. Low time-to-connect is important.

Also called niter.

I live near the ocean. Around here we call this "salitre": salt from seawater that becomes airborne, shortening the life span of every electronic. Desktop computers are especially susceptible.

The only thing I hear in that regard is to just never turn off the computer, since doing so would allow the corrosion to take place at a lower temperature, without circulation, etc.

But electricity is not cheap, and I put this machine together myself so I don't have to worry about voiding the warranty.

And keeping the AC on 24/7 is both expensive and unhealthy.

Some more info about the PinePhone

Pre-order page on the Pine Store

The early adopter edition of the PinePhone is now available for pre-order. This batch is 3000 units, from what I know ~1000 are already sold. These units are currently being produced, and are planned to ship in December/January. Mass production of the consumer edition of the phone is planned to begin in March 2020.

I just pre-ordered mine, is anyone else getting one? Any thoughts on the state of Linux smartphones, whether it's the PinePhone, Librem 5, or something else?