Most recent update is here.

The Tildes community has been amazing and patient with me as a new and uninformed Linux user, and I'm greatly appreciative of that. I return to you today with yet another request.

Hardware

System76 Oryx Pro
Distro: Pop!_OS 19.10

Issue #1 (mission critical)

Brother MFC-L2750DW

I have a Brother printer/scanner for which I have installed the drivers using the .deb file provided on the Brother site. It's connected via USB. Printing works fine; scanning does not. My husband and I both need the ability to scan for our jobs, so this issue is pretty important to us.

I am using the program Document Scanner (I believe it's one of the GNOME default programs?). When I open the program it says "Searching for Scanners" and then recognizes my scanner, giving the model number and says it's "Ready to Scan". Whenever I attempt to scan, however, whether from the ADF or the flatbed, it says "Unable to connect to scanner". I am not sure how to proceed, and any guidance on this would be greatly appreciated!

Issue #2 (optional)

Hyperkin Duke Wired Xbox Controller

This is an optional issue and not at all one that needs to be solved by any means. A while back my husband got me this because it's my absolute favorite controller of all time (I know, scoff all you want!). It worked fine in Windows, but now that I've shifted over to Linux it has been sitting and gathering dust.

When I plug it in the controller rumbles briefly (which it also did on Windows), but other than that does nothing. No input is accepted. If it's easy to get this up and running in Linux, I'd love to be able to use it, but if it's not that's totally fine. I have another controller I can use, and again, none of this is essential to my work. I just figured since I was asking for help I'd throw this in here too.

If you need any additional information or need me to try any specific things, let me know!

due to the looming pandemic forcing everyone to stay inside, I've recently decided to get back into video games. I did a fresh install of windows 10 the other day, and tried to play a few games with my controller. I found that whenever I press the right trigger on my controller, my computer's audio cuts out system-wide immediately and does not come back on until I restart.

The controller is a wired Afterglow for Xbox 360 PL-3702.

Windows 10, version 1903.

I see two audio devices under Sound, Video and Game Controllers in Device Manager: a AMD High Definition Audio Device and a Realtek Audio device.

I've tried updating drivers for my controller and audio controllers.

I've reproduced the issue and collected logs of it following the steps here. If you know how to read these I'd be happy to send you the trace.

Now, I've tried to look at the trace of this in both Windows Performance Analyzer and Windows Media eXperience Analyzer to try and get a better sense of what's causing this. I see a pretty clear event where a bunch of stuff shows up in the visualizer, but I don't know what any of the stack traces that show up mean. This did not occur on my previous install of Windows on the same computer so I suspect it's related to something with some new Windows "gaming" feature I didn't have before.

I'm really at a loss as to where to go from here. It's both perfectly clear and completely mystifying. Any ideas?

Solved!

Thanks to @pseudolobster's post here, I was able to resolve the issue by creating a new user account on the computer. I'm leaving the post up for posterity, in case anyone else is ever searching up this same issue in the future.

My husband is starting to transition to work from home. He is using his personal computer and just yesterday set up a VPN, Microsoft Teams, and Windows' built-in remote desktop so that he can access his work computer. Everything worked smoothly and he was able to finish out his workday from home just fine.

Primary Issue

This morning, upon booting his computer, he cannot access his Start Menu. It is on screen, and it appears clickable, but nothing comes up. Likewise, the search bar in his task bar is present on boot, but upon clicking the start menu for the first time it disappears and does not return. Other basic Windows functionality seems to be broken. Alt-tabbing does not work to switch between windows. System tray icons are present, but right clicking them and selecting an option does nothing. We cannot open taskbar settings or network settings this way, for example.

This might be indicative of a larger breakdown. Even by command line, I can't get to the Windows 10 settings or Windows Update. It seems like all of the "new Windows"-style interfaces won't start (though the old ones, like the Control Panel, do).

We can still open up apps by clicking on the links in his taskbar, and those seem to work fine. I can also get to the run command with Win+R.

He is running Windows 10, and as far as I know, it's fully up-to-date (I can't open Windows Update to check).

Additional Information

In attempting to diagnose this issue, I've come across several others that are potentially related. I don't know if these are relevant and they're not a primary concern at the moment, but I'm including them here in case they help contextualize what's going on.

There seems to be a runaway process that slowly eats up more and more memory over time, as well as a chunk of CPU. Sometimes it's called "Service Host: Windows Push Notifications User Service_#####" and sometimes it's called "Service Host: WpnUserService_#####" with the numbers changing each boot.

Also, in attempting to restart the computer, it sometimes (but not always) pauses with a notification about programs still running, with one of them being "Task Host Window" with the message Task Host is stopping background tasks. (\Microsoft\Windows\Plug and Play\Device Install Reboot Required) Finally, immediately before restarting, it shows an error message from "svchost.exe" which reads The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application.

Is this potentially a malware/intrusion issue?

Attempted Solutions

I have tried, to no success:

• Rebooting the computer, both via a restart in Windows as well as by holding down the power button
• Signing out and back in to his user account on the computer
• Running sfc /scannow
• Running DISM.exe /Online /Cleanup-image /Restorehealth

Request for Help

I know we have a lot of techy people here, but I also know you are all probably busy with everything that's going on. Nevertheless, if anyone has any guidance or help they could give on this issue, I'd greatly appreciate it.

Also, it's been a while since I've used Windows, but IIRC there's a way of just resetting the whole thing and starting fresh? That's not ideal, but if that's the course of action I need to take, just let me know. Ultimately I just want this to work, by whatever method, so that my husband can be at home and reduce his exposure.

EDIT: The problem has been solved. @Sill identified the problem here and @cfabbro found a work-around here. Crisis averted!

I listen to some internet radio stations on my computer, but a couple of them aren't working any more: they appear to play, but there's no sound coming from my computer's speakers.

It is only two stations. I've tested other internet radio stations I listen to, and they still work: I can hear them. I can play and hear YouTube videos. I can stream Spotify on my computer. I can play and hear my music files stored on my computer's hard drive. So I know my speakers work. I know Chrome works as a music player for other sources, including other internet radio stations. It's just these two radio stations.

One of them is this radio station. Also this radio station. I know their digital streams are working, because I can listen to them via an internet radio app on my phone. So I know their digital signals are being sent out. But, while my phone app can play them, my computer browser can't play them.

I've tested both non-working stations in Chrome and Internet Explorer. They both don't work in Chrome, but this station also doesn't work in IE.

I'm using Chrome 80.0.3987.122. And I'm running Windows 7.

This problem only started a couple of days ago.

What's going on? How do I fix this?

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 have a large VirtualBox VM on an external HDD. The HDD fails the S.M.A.R.T. test. The VM still works fine, but any regular attempt to copy the VM files over to a healthy drive fails ... there is clearly already something corrupt in the VM's virtual HDD, although it is not (apparently? yet?) affecting the functionality of the actual VM.

Any suggestions on how to save the VM? Linux Mint Guest OS, Pop_OS (Ubuntu) Host. The VM is nearly 800 GB. Both regular copy and rsync fail.

Thanks,
Eric

PS: (and perhaps I should have led with this, but...) is it okay to ask these kinds of specific, technical, "help me with my tech-stuff" questions here on Tildes?

Update to the update ... moved update info into a comment ... will keep my progress updated in that primary comment.

Danke, y gracias to all

So my friend has a computer she put together, and after replacing what feels like every single part on the rig, multiple trips to the repair shop, and calling a priest wrestling the demons out of it, it is randomly cutting power and we think the replacement power supply might be just as busted as the last one. Are there decent odds of that being an issue, or could it be something that we are overlooking?

EDIT: So, I had a car issue pop up and I won't be able to to take a look at at it tonight. Will download the tools you all mentioned to a jump drive and will keep you posted.

Was there, stayed up the whole time. Really thinking it might be a bad power switch that stuck, so it would turn off randomly. Thanks for all your help.

FINAL EDIT: So I narrowed it down to the Graphics Card and/or the Cooling System. Running the Heaven Benchmark on Extreme pretty reliably cleans it's clock, especially turning it off and then turning it on again. This happens on the latest Windows Updates, with latest Nvidia Drivers. (RTX 2080) Pulling the card and running the benchmark anyway causes the same issue, and this time it powered on and then back off in a loop. CPU-Z stress caused it to crash, so I'm assuming it's the cooler. Thanks again.

I just moved, and my new apartment is set up a little weird - gotta love old construction. As a result, the router has to be in the other end of the home from my PS4 which is my primary internet consumption device. The way I see it I have four options:

• Hot spot from my cell phone - not ideal because I pay per gig of data and it's not fast enough for gaming

• Run a really long Ethernet cord - possible but would be a little bit of a project. I looked into it a little and I'm curious if there is any appreciable difference between Cat 5, 6, 7, or 8 from a home user perspective. Also, what's a good resource for buying one, since Amazon is not really trustworthy anymore?

• Use a WiFi booster - I don't really have any experience with these. Would it be as fast as using the router, and if I used an Ethernet cable to connect my PS4 to it would it still be limited to wifi speeds?

• Get a stronger router - considering I technically rent my router from Verizon this is probably the most cost effective way to go in the long term, any suggestions for brands?

I've been wondering about this for a while whenever I'm on a metered connection or a capped one.

It'd be cool if I could use my vps to help save data in exchange for latency. Having it download and compress any compressible materials before serving them would be a godsend, but it sounds very edge case-y given how places like youtube deliver videos in bite size peices

Does something like this sound at all possible, or should I just assume it's too niché and look for other data saving ways?