Latest Ubuntu related questions

Score: 0
After input events, graphics show older version for a short while, creating a jumping effect in 21.04
sm flag

Yesterday I upgraded to Kubuntu 21.04 from 20.10. Since then I have had this issue where the visuals I see seems to revert to an earlier (cached?) state for a very short while. E.g. (just observed on the previous line) I am writing wherever (console, here, ...), and after having written a word or new character, I for a short while (maybe half a second), I see the state a very short while ago, e.g. befor ...

Score: 2
G Ugauga avatar
Extend or create new swap file
pe flag

I have a kubuntu installation (Kubuntu 21.04), which during install created a swap file of 1Gb. Tryed to create a swap file of 4GB, using the following commands:

$ sudo -s
# dd if=/dev/zero of=/swapfile bs=1G count=4
# chown root:root /swapfile
# chmod 600 /swapfile
# ls -lh /swapfile
# mkswap /swapfile
# swapon /swapfile
# echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab

And after it was li ...

Score: 1
D1Ck3n avatar
Connect to Ubuntu 20.04 via VNC before login (with GDM3)
tk flag

Good day,

I need to be able to connect via vnc to an Ubuntu 20.04 client, log out via it and log back in. My problem: VNC can not connect when I am in the login screen. I know this is a general problem with GDM, but unfortunately switching to lightdm is not an alternative.

i found this article here where the script in the last post helped me see the login screen, but i get a black screen when i log  ...

Score: 1
str1ng avatar
How to securely delete/wipe out a hard disk so it's hard to recover data?
sh flag

as I am new Linux user I don't really know yet where's path to my disk, so therefore also I don't know how to wipe out data from it.

As I mentioned I would need something that will wipe out a hard disk, so I did a bit of googling and I found out that something like command shred will most likely suit me.

Now, I found out that this is syntax of command:

shred [OPTIONS] FILE [...]

So, I would probably run  ...

Score: 0
Aka Coder avatar
Failed to register resizing support, rc=VERR_INVALID_FUNCTION
au flag

I am running Ubuntu 20.04.2 LTS on VirtualBox and I am trying to use tmux to create another window by running the command dmesg -w. I can successfuly create a new session, but when I try to make the new window, I get the following error (s)

...
[8941.891067] Failed to register resizing support, rc=VERR_INVALID_FUNCTION
[ 8946.893618] Failed to register resizing support, rc=VERR_INVALID_FUNCTION
[ 8951.894 ...
Score: 1
Caja-dropbox with "bind --mount" doesn't automatically sync
br flag

I want to use mount --bind to link to different locations on my filesystem for syncing with Dropbox as symlinks are no longer supported:

mount --bind ~/Documents ~/Dropbox/Documents

I expected that files would be automatically uploaded to Dropbox like any other file.

Files created in mounted location are flagged as "syncing" and looking at the Dropbox indicator, there is an option to "Pause Synci ...

Score: 4
08915bfe02 avatar
Terminal opened from Terminal opened from Files fails to find user settings
cn flag

I have just performed a fresh install of Ubuntu 21.04 (formerly using 20.10) on my desktop. However, I am facing an problem with GNOME Terminal.

If I open the Terminal via the keyboard shortcut or the right-click menu on my desktop, everything works fine. If I open Terminal via the file browser (Files), however, the initial window works fine but any subsequent Terminal tabs/windows I open from wi ...

Score: 0
sohail ahmad avatar
How to increase Fan Speed In Ubuntu On Elitebook 8560w
cn flag

Hi I have Elitebook 8560w with ubuntu 20.04 Installed and this is my CPU Temperature From Just Browsing Nothing Heavy

BAT0-acpi-0
Adapter: ACPI interface
in0:          16.97 V  
curr1:         0.00 A  

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +83.0°C  (high = +86.0°C, crit = +100.0°C)  ALARM (CRIT)
Core 0:        +82.0°C  (high = +86.0°C, crit = +100.0°C)  ALARM (CRIT)
Core 1:   ...
Score: 0
Brian J Davison avatar
Running Optus Sports on Ubuntu 20.04
cn flag

I am trying to run Optus sports on ubuntu through Firefox 89 It all loads up and when I try to run a soccer match (video) it comes up with "oops there is a problem" The help desk at Optus is not very helpful.

Score: 0
mfatih avatar
add_executable Error - CMake
sd flag

I created a package and source file in my Ubuntu 20.04 computer. My goal is to visualize dummy sensors and objects in Rviz2. To do that I followed the How to visualize sensor data in ROS2 article. And, when I went to build the package with the command:

colcon build --symlink-install

I got this error:

Error

The cmake file I used is the following:

C Make Fİle

I am using ROS2 foxy distro.

Score: 0
simonericmoon avatar
Ubuntu VM python2 pathlib intstall error
in flag

so I'm trying some python 2 scripts in my Ubuntu VM. I installed python 2. One of the scripts need the module pathlib. Tried to install it but got a error message:

~/Desktop$ sudo apt-get install -y python-pathlib
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 8632 (unattended-upgr)
N: Be aware that removing the lock file is not a solution and may break your system.
E: Unable to  ...
Score: 0
Elon_s_mom avatar
How to copy files into a new file
cn flag

How to copy files from one file to another file that has contents I want to keep? In other words, I want the contents of file1 to go in file2 but the info in file1 to be added to the existing stuff in file2 ? The format in file2 should ideally have file2 info first then file1. Then I want to add file3 to file2 with the contents in file2 resulting in an output format of 1. File2 contents then 2. File1 co ...

Score: 3
20.04: Adjust display brightness in smaller steps with brightness buttons
us flag

The buttons work (out of the box) and brightness is preserved (with acpi_backlight=vendor in GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and sudo update-grub).

Brightness is controlled between 0 and 255 by ±1 (by echoing to /sys/class/backlight/amdgpu_bl0/brightness), but buttons change it only by ±12, which is very coarse to my eyes. Ideally, I'd like to have a logarithmic scale or, at least ...

Score: 2
xpusostomos avatar
Minimize window keyboard shortcut... impossible?
cn flag

Can it be true that Ubuntu 21 / Gnome, not only has no minimise window shortcut key, but it isn't even possible to set one? The keyboard shortcuts settings panel has shortcuts for zillions of obscure functions, but nothing for that most fundamental of functions.

Score: 0
Accidently deleted wchar.h in ubuntu
cn flag

I was working with some files in usr/lib and usr/include where I accidently deleted wchar.h header file of ubuntu. Is there any way by which I can retrieve the file back or get the file online?

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