Ceci est une ancienne révision du document !
Welcome back to another edition of Questions and Answers! In this section we will endeavour to answer your Ubuntu questions. Be sure to add details of the version of your operating system and your hardware. I will try to remove any personally identifiable strings from questions, but it is best not to include things like serial numbers, UUIDs, or IP addresses. If your question does not appear immediately, it is just because there is such a lot, and I do them, first-come-first-served.
Recently I had a full stack developer log a ticket for Chrome on Ubuntu 22.04 spaz-ing out with “connection not private” and “cert authority invalid”. I had the guy update his machine and try another browser, Brave. Brave worked at first and then also turned to mush. We would remove the browser, purge anything related to it and re-install and it would work. Then fifteen minutes later, I would get an image of the “error” and we would be back to square one. This continued and of course the website with the error is Gitlab, so we know it is not the website. This is now cyclical and a clean up results a working browser for fifteen to twenty minutes, then the issue is back. I was not convinced it was a machine issue, but also could not pinpoint why the browser would go out of whack in a short period of time. At first I was busy, so we did it over instant messaging, but later when we both were free, we did a desktop sharing session. And when I leave the session all is well, just to get the message twenty minutes later saying it is doing the same. I was now convinced the user was doing something, but I could not say what. This time, instead of ending the call, I opted to stay on for 20 minutes. Lo and behold in about 15 minutes, the user opens up a tab, goes to some really sketchy address and the screen fills with ads and popups and whatnot. I stop him right there and get him to install ublock origin. We clear his browsers cache & history etc. I ask him to visit that site again. This time ublock immediately pops up saying the site is trying to inject code etc. If you have to watch some sports and you do not have paid services television, go to your local sports betting site and watch it there, you will be better off. Most of these places have legal streams you can watch to make your bets. If a site address seems dodgy, it probably is dodgy. Beware of sites that try to disable your mouse right click and copy.
Q: I have a Kubuntu 23.04 install and I have been trying different DE’s as my ‘puter is rather old, just to get a feel of things and see how much snappier it can be. I decided to stick with KDE, but now my night light is not working any more and I do most of my work at night. Google says it is Nvidia drivers, but this in Intel 945? I would like some input here.
A: Honestly, I’d just install redshift or reinstall fresh, as tacking on desktops is not something I’d recommend. As for older hardware and lighter desktops, maybe have a look at Bodhi Linux, if you want to stick with the Ubuntu base.
Q: My laptop has a very slim bezel and a touch screen. My issue is that if I adjust the screen, I cannot help but touch the glass and the mouse pointer clicks there. I have tried turning it off via the config file, as per the internet, but it is hit-and-miss, as when it comes out of sleep, it does not read the config file again, and it is back on. A reboot will solve this, but what is the point?
A: Enter your computer’s BIOS / UEFI and turn it off there.
Q: I have Ubuntu 23.04 with Virtualbox and FerenOS in the VM. I also have Ubuntu 23.10 beta in the VM. The issue I have is that if I leave it for a while, FerenOS goes to “sleep” with a black screen, and no amount of keyboard or mouse jiggling will wake it up. This is not the case with Ubuntu 23.10. The only way it wakes up, is if I send it the shutdown signal, which does not shut it down.
A: That is going to be one for the folks at the FerenOS boards. Whist it is based on Ubuntu, it is not an official flavour.
Q: What means this: “Stderr: VBoxManage: error: VT-x is not available (VERR_VMX_NO_VMX)”
A: That means your setup does not support virtual extensions. You did not tell us what machine or OS you are using. Another option may be that it is turned off in your BIOS settings, if your machine does indeed support virtual extensions.
Q: I’m trying to write an in-house auditing program, but I’m learning still and while I’m sure this is the correct command I used in Ubuntu 14.04, something seems to have changed, and I’m not sure what. If I just run the command I can see the following: brendan@giblets1:~$ dmidecode system-serial-number /sys/firmware/dmi/tables/smbios_entry_point: Permission denied /dev/mem: Permission denied
A: Sudo… Happens to the best of us.
Q: How come the version of a snap package is still behind the official latest version of the app? I thought snap is supposed to keep everything latest?
A: Snap packages are created separately from an application’s release and they may not be made by the application’s developer, but rather an enthusiast who uses the application themselves. Snap does not equal official.
Q: I have been learning Docker & Vagrant on my Ubuntu 22 laptop. I ran a docker image and I have <none> and <none> and lots of them. Does this affect anything? I did run sudo apt autoremove, but it made no difference.
A: Sudo apt autoremove is for your system files and does not affect programs and their caches. You are on the right track though. The docker version is prune: docker image prune
Q: I am wondering what the issue could be, I can connect to my machines via RDP, but if I disconnect for too long, I cannot connect again, and it is frustrating. I only use LTS and all machines are up to date.
A: Install caffeine and caffeine indicator on the machines and activate them. Repeat your test and get back to us.
Q: How can I install a pecific version of any app in the Snap store? If I go to discord, it only shows latest/stable latest/edge
A: As far as I know, you cannot. You could do that with AppImages though and I’m not sure about Flatpaks.
Q: How come I keep seeing this ~~~ Reading package lists… E: The repository 'http://security.ubuntu.com/ubuntu kinetic-security Release' does not have a Release file. E: The repository 'http://archive.ubuntu.com/ubuntu kinetic Release' does not have a Release file. ~~~~ I just goes on and on. Someone said I should choose the UK mirror, but I don’t know how to do that.
A: That won’t help either, it is because Ubuntu 22.10 has reached EOL already. Install a LTS release if you plan on keeping the install.
Q: With flagship Ubuntu 22.04 installed, I can dim my display to the minimum, which is great for evenings. I prefer XFCE though, so in Xubuntu, instead of going to the dimmest, it turns the screen off and I cannot turn it back on again, I have to reboot. How do I fix this?
A: It’s probably a bug. File a bug report with as much info as you can.