troubleshooting

What is the scope of /var/log/user.log file?

What is the scope of /var/log/user.log file? /var/log/user.log What’s the scope of this log file? Is it related only to currently logged in user or to multiple users and which ones? What this log file is about and when should I look into it? Asked By: metablaster || Source The syslog module provides system logging …

Total answers: 1

blank screen after ipv6.disable=1 removal from grub cmdline

blank screen after ipv6.disable=1 removal from grub cmdline I want to re-enable IPv6 on my system which is currently disabled in GRUB directly. But if I remove ipv6.disable=1, I then get a blank (backlit) screen. It took me tonight to figure out that I have a timeshift backup of OS (Linux Mint 21.3), I have …

Total answers: 1

WiFi randomly crashing every 15 seconds

WiFi randomly crashing every 15 seconds I just installed Ubuntu on my own 2 days ago. I noticed that my wifi randomly crashes every 15 seconds or so. I have no clue how to fix it whatsoever. Thank you in advance! EDIT: Thanks for viewing my question. Here’s the required info: I have tried restarting …

Total answers: 1

Webcam stoped working after upgrading from 20.04 to 23.04

Webcam stoped working after upgrading from 20.04 to 23.04 I have this USB webcam that was working fine until I upgraded from 20.04 to 23.04. The webcam still works on Ubuntu 22.04 (I’ve just tested it on another machine). UPDATE: I also tested in 23.10 and it doesn’t work When I connect the webcam to …

Total answers: 1

How do I solve this FPS steep frame rate drop when gaming on Linux Mint?

How do I solve this FPS steep frame rate drop when gaming on Linux Mint? Relevant specs from neofetch: OS = Linux Mint 21.1 x86_64 / Host = H310M H 2.0 / Kernel = 5.15.0-72-generic / DE = Xfce 4.16 / CPU = Intel i5-8400 (6) @ 4.000GHz / GPU = NVIDIA GeForce GTX 1050 …

Total answers: 3

I connect to the router but cannot connect to the internet Ubuntu 20.04

I connect to the router but cannot connect to the internet Ubuntu 20.04 I am having an issue with connecting to internet over my home network. I can definitely connect to the router, I can send ping to the router address, I can even see that my laptop is connected to the router from the …

Total answers: 1

How do I know if Ubuntu 22.04 has any virus?

How do I know if Ubuntu 22.04 has any virus? I have a Windows / Ubuntu 22.04 dual boot. I get screen artifacts as shown below. At that moment, what I restarted Ubuntu. When it turned on, it no longer appeared and, until now all the applications and files that I have are working correctly. …

Total answers: 1

Failed to reboot after upgrade from 20.04 to 22.04 – is LVM the problem?

Failed to reboot after upgrade from 20.04 to 22.04 – is LVM the problem? AFAICT, my problem is different from others with this same title. My computer is a HP Proliant MicroServer. It was running Ubuntu Desktop 20.04 without any problems and was fully up to date before I ran do-release-upgrade. Ubuntu is the only …

Total answers: 1

Weird dmesg Errors, Perhaps causing the Lag?

Weird dmesg Errors, Perhaps causing the Lag? I have some lag on my system that acts like a memory leak. Overtime, especially with repetitive suspends, my system can become unusable. Even shutting it down can take 15~20min if i don’t hardshut it down. The memory usage however always seems fine, and I ran a memtest …

Total answers: 1

Ubuntu 18.04 LTS slow boot and problems after update

Ubuntu 18.04 LTS slow boot and problems after update I have ubuntu 18.04 LTS installed in my machine. Since the last update (kernel 4.15.0-176-generic) the machine is very slow to boot (login) and there are problems after the login (slow and laggy). At the login screen the keyboard, touch-pad and mouse do not respond for …

Total answers: 2

Stuck in emergency mode after cloning my system with clonezilla

Stuck in emergency mode after cloning my system with clonezilla I cloned my installation from a 240GB SATA SSD to a 500GB NVMe SSD using Clonezilla. The cloning was completed successfully, except for a failure with initrd (unfortauntely I don’t remember the actual error). After rebooting I manage to get to right before the login …

Total answers: 1

Identifying physical memory slots from dmesg ECC error outputs

Identifying physical memory slots from dmesg ECC error outputs I have a machine with 768 GiB of ECC DDR4 ram. One of the modules is flaky and needs replacing: dmesg fills up with entries like: [Mar25 08:07] mce: [Hardware Error]: Machine check events logged [ +0.000014] EDAC skx MC1: HANDLING MCE MEMORY ERROR [ +0.000003] …

Total answers: 3

How can I track script which gives me "command not found" right after the login?

How can I track script which gives me "command not found" right after the login? When I login, I have these messages: -bash: $’r’ : command not found -bash: $’r’ : command not found -bash: $’r’ : command not found It is quite clear that it is caused by Windows-style line endings in some startup …

Total answers: 4

Figure out which process forks too many threads

Figure out which process forks too many threads I have a process in a Linux installation that at some point has some kind of spike and passes the max allowed number of threads/processes allowed by the system. I found this by checking ps -elfT | wc -l repeatedly. But what I don’t know is what …

Total answers: 1

How to troubleshoot DNS with systemd-resolved?

How to troubleshoot DNS with systemd-resolved? How would you go about finding the DNS servers used by systemd-resolved, for troubleshooting purposes? Generally I can use dig and test the DNS servers shown in /etc/resolv.conf. (Or windows – ipconfig /all + nslookup). But that approach doesn’t work when resolv.conf just points to a local resolver daemon …

Total answers: 4

Machine freezes once it hits swap space under heavy load

Machine freezes once it hits swap space under heavy load I encountered several crashes of my machine. Meanwhile, I can reproduce it when I start a program that fills up all memory. Once the system starts writing to the swap file, the system freezes and I have to reboot. In the journal, I see no …

Total answers: 1

How to detect, find and install a missing firmware

How to detect, find and install a missing firmware Context Today I installed Debian 8 on my HP Pavilion Notebook PC, during the installation (specifically during the network setting up), the the system prompted: Hardware needs non-free firmware to run, missing firmwares are: – rtlwifi/rtl8188efw.bin – rtl_nic/rtl8106e-1.fw after the installation the wifi it’s not recognized …

Total answers: 2

What is a tainted Linux kernel?

What is a tainted Linux kernel? Under certain conditions, the Linux kernel may become tainted. For example, loading a proprietary video driver into the kernel taints the kernel. This condition may be visible in system logs, kernel error messages (oops and panics), and through tools such as lsmod, and remains until the system is rebooted. …

Total answers: 2