Questions tagged as ['21.04']

Questions about 21.04 are off-topic on Ask Ubuntu, unless you're asking how to upgrade to 21.10. Ubuntu 21.04 (Hirsute Hippo) was a non-LTS version released on April 22, 2021. It became End Of Life (EOL) on January 20, 2022.
Score: 0
Jen Thomas James avatar
Wifi range is cut down all of a sudden
cn flag

I am using Ubuntu 21.04. Everything was going good, but suddenly yesterday, I couldn't connect to my Wi-Fi. It will connect, but after some time, it will disconnect. When I am very close to the modem there is no problem, but when I am a little far away this issue starts.

I am using Windows alongside Ubuntu. I can use my Wi-Fi with Windows with no problem at a location, but can't use Wi-Fi with Ub ...

Score: 1
logicito avatar
Does Hibernation save the whole RAM or just what is being used?
cn flag

I have noticed when I hibernate with no open apps it does it faster, than when I have apps open, probably, half the time, I thought that hibernation will save all the memory (RAM) content to the SWAP partition and not only the open apps, please could you help clarify what is going on, thank you Ubuntu 21.04 - Kernel 5.11

Score: 0
Rob Lynam-Wilkes avatar
Bluetooth not available after installing Ubuntu on RPi 4
cn flag

Just installed Ubuntu on to my Raspberry Pi 4 (8GB). But I hate wires, so I want to connect my BT keyboard and mouse. However I get the [Please plug in dongle] message when I open by BT settings.

I have also tried updating the software and firmware as well as commands such as

sudo systemctl restart bluetooth service bluetooth restart

when I run

service bluetooth service

I get

     Loaded: loaded (/lib/sy ...
Score: 0
CyberHare avatar
While true script not running at boot
ni flag

I have a script that is meant to work with a UPS Hat for a Raspberry Pi 4b. I am running Ubuntu 21.04 server 64 bit. When I run the script manually from /home/user/ it works great. However, after following the instructions and creating an rc.local file I cannot get the script to start automatically at boot. I have placed the script into the /user/bin/ directory and done a chmod +x on it.

#!/b ...
Score: 1
Berniek avatar
unattended-upgrade breaks 21.04 raspbeery pi
bm flag

New full install of ubuntu 21.04 Desktop (64 bit) on raspberrypi Boots to desktop

Do nothing but wait because unattended-upgrades (on by default) is upgrading. Unattended-upgrade finishes with request reboot to complete.

Reboot but no desktop (or terminal on monitor)

Repeat complete procedure but immediately install ssh

Same result Login using ssh.

Remove desktop & dependencies & configurat ...

Score: 0
Help sought to resolve sound delaying video on youtube in firefox browser
nl flag

I am using ubuntu 21.04 operating on apple silicon mac in UTM virtual window. Opened youtube in firefox browser. Sound is lagging video.

Score: -1
Armia Khairy avatar
Can't install NVIDIA drivers after I accidentally removed them
pw flag

So, I accidentally uninstalled NVIDIA drivers with apt autoremove, I tried to reinstall it from "Software & Updates" app but all the options in Additional drivers are greyed out.

I don't want to manually install NVIDIA drivers using the packages from NVIDIA's website because it's very tedious and usually does not work, What should I do now?

My laptop is Lenovo IdeaPad L340 Gaming with Gtx1650 ...

Score: 0
Gigiux avatar
Failure in pairing bluetooth device in Ubuntu 21.04
eg flag

I see that failure in pairing Bluetooth devices is commonplace. I have Ubuntu 21.04, I plugged a Bluetooth 4.0 Adapter Dongle, the device (headphones) is visible but no pairing is obtained. I checked the status of the Bluetooth and it seems to me it is running:

sudo service bluetooth status
● bluetooth.service - Bluetooth service
     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendo ...
Score: 1
heynnema avatar
Ubuntu 21.04 No sound on new Dell Inspiron 7700 AIO
ru flag

I just purchased a new Dell Inspiron 7700 AIO computer with 11th gen i7 CPU. Installed Ubuntu 21.04 and it mostly works ok. However, I have no sound from the built-in speakers, and the sound settings panel shows "Dummy Output" as the only output choice.

I've currently attached a bluetooth sound output device and am successfully using it for sound output, but I'd prefer to use the AIO's built-in s ...

Score: 0
user227495 avatar
Missed MOK password entry while booting
us flag

I am new to MOK so please forgive mistakes. I got a new laptop and installed 21.04. The Wifi driver was not working. With help from someone on the internet, I located the Debian package for the Realtek Wifi card and installed it. It said that if I enable secure boot, Wifi will not work. And that is how it is now. I am using ethernet for the internet.

During last day's update, there came some prom ...

Score: 0
egc avatar
Ubuntu 21.04 nvidia brightness control
sn flag

I have MacBookAir 3,2 (2010) that works surprisingly well with Ubuntu 21.04 (GNOME), when its NVidia driver is correctly enabled.

The problem comes when controlling the screen brightness. The default hotkeys work, xbacklight and nvidia-settings -a BacklightBrightness=## both work, but the brightness setting set through any of these means does not persist between reboots or shutdowns.

From a few simi ...

Score: 1
Newsonic avatar
How to disable the touchscreen in Ubuntu 21.04?
cn flag

I faced a problem after a couple of days that my malfunctioned touchscreen was on unexpectedly, despite setting MatchIsTouchscreen "off" at /usr/share/X11/xorg.conf.d/40-libinput.conf

How to make it disabled just like Ubuntu 20 and the older versions?

Score: 2
Adonis Cedeño avatar
Using a PuTTY private key from windows to linux
cn flag

I've generated two keys on PuTTY: public and private. Using this software on windows I can connect to the server as usual.

Then I tried to copy those files in my ubuntu machine (21.04), and logged in loading the private key (open putty, write the user@hostname and then load the private key at SSH>Auth), but there is unable to connect being rejected by the server as this error says:

Unable to loa ...
Score: 0
vinicius de lima avatar
Steam doesn't install on Ubuntu 21.04
in flag

I'm having the following error when I try to open the latest steam version installed with

sudo apt install steam
Running Steam on ubuntu 21.04 64-bit
STEAM_RUNTIME is enabled automatically
Steam runtime environment up-to-date!
Steam client's requirements are satisfied
WARNING: Using default/fallback debugger launch
/home/vinicius/.steam/debian-installation/ubuntu12_32/steam -nominidumps -nobreakpad
[202 ...
Score: 0
FedKad avatar
How can I define a Wine application to handle special links?
cn flag

Is it possible to activate a wine application when I click a URL having a specific method?

More specifically my question is this:

I have used amule in the past to handle ed2k: links. When I clicked an ed2k:… link on a web page, amule was handling that link. Later, I decided that eMule under Wine would be more efficient; so, I removed the amule Ubuntu package. Now, when I click to a URL like the followi ...

Score: 0
logicito avatar
Ubuntu 21.04 : Error messages after resuming from Hibernation
cn flag

I configured Hibernation on Ubuntu 21.04 with the standard kernel 5.11, I followed this guide:

Everything works, I can Hibernate and Resume to the same state, no issues, nonetheless I get the following errors now while resuming (also after the fresh restart), I would assume they were created while configuring the Hiber ...

Score: 1
Dequog avatar
GCC compiling problem
es flag

I just downloaded the GCC compile for C/C++. After compiling with the command gcc main.c -c -lGL -lGLU -lglut I get a permission error which can be fixed by changing the permissions. I then get this error: bash: ./main.o: cannot execute binary file: Exec format error. Will you help me fix this? Also if it helps I'm using C.

-Thank you in advance

Score: 0
Jacob Waslyk avatar
audio Ubuntu Problem
br flag

I was just recently using ubuntu and tried to fix the audio ic adjustment issue. I them by accidentant turned off all my audio and I cannot get it to work I tried alsa-force reload, and I've reinstalled the pulseaudio packages. But it doesn't seem to work. Can someone help?

Score: 0
Matteo Sottocornola avatar
Getting a Black screen when dual booting from a MacBook Pro
cn flag

I have successfully installed Ubuntu 21.04 on a partition of my SSD. However since the grub install repeatedly failed whilst installing Ubuntu, I told terminal to install Ubuntu without it. And it did except whenever I select my Ubuntu partition while booting up it immediately gives a black screen. I have tried holding down the left shift button and pressing esc repeatedly and pressing ctrl+alt+T but no ...

Score: 0
Xle6yWek avatar
installed shim-signed package post-installation script subprocess returned error exit status 1
co flag

I'm trying to install kubuntu 21.04 with windows on the same drive, I shrinked my D: drive for 80GB, installed iso from official site and wrote it to my usb drive with rufus.
When I got to disk setup page I selected this 80GB unallocated storage as root ('/') and after everything went ok I got popup with this text 'installed shim-signed package post-installation script subprocess returned error exit ...

Score: 0
kz-n avatar
What is the quickest way to convert a GeoTIFF file to PNG and crop the output?
gb flag

I need to automate for a project converting tons of GeoTIFF files to PNG and being able to resize them in 4 equally sized squares.

What would be a program I could use for this?

Score: 0
user3174454 avatar
XUbuntu touchpad middle-click does not work in vmware player
ke flag

I use XUbuntu 21.04 and the middle-click I was so used to does not work there. XUbuntu is run inside vmware player on a Dell Latitude 5500 laptop. The middle mouse button event is not recognized as such by xev.

I also tried to add an X conf file as described here:, but it does not work (tried in Terminator).

Update: actually, it works with USB mouse. So, onl ...

Score: 0
try to install ubuntu 21.04 on an old Medion desktop using a motherboard MS 7800ver.1
in flag

I'm using medion desktop with a motherboard NS 7800 vER 1 when trying to install UBUNTU 21.04 I get 3 failed

  1. failed to start Dispatcherdaemon for system-network.
  2. failed to start Snap DAEMON.
  3. Failed to start ubuntu live cd installer is there a problem with this board or is it something I am missing this is my first try with Linux many thanks if you can help.
Score: 0
stebs avatar
RTL8822BE drivers not working Ubuntu 21.04
cn flag

I am still very new to Ubuntu, and have had this issue ever since I made the switch from Windows to Ubuntu on my laptop. The WiFi card is the Realtek RTL8822BE and I have tried installing drivers multiple times with seemingly no success in sight. I feel like I have exhausted all possible solutions to no avail.

I have previously posted a question on this topic (now deleted) because I was unable to ...

Score: 1
user403329 avatar
A responsive live desktop 21.04 image produces a slow VM image
us flag

When I boot up a live desktop ISO in Virtual Machine Manager (kvm/qemu), the live system is super snappy and when I look at the "Resources" in the System monitor the 4 supplied cores are pretty much idle (RAM: 6GB, no problem).

Then I install the 21.04 desktop as "minimal". After the reboot the responsiveness experienced in the live ISO is not there anymore in the "true" VM. I can wait for hours, b ...

Score: 0
Ubuntu 21.04, disable Thinkpad trackpoint
jp flag

I have a Lenovo Thinkpad T450s with a trackpoint and a touchpad. Before upgrading to Ubuntu 21.04 I could disable the trackpoint on the terminal with the command

xinput set-prop "TPPS/2 IBM TrackPoint" "Device Enabled" 0

After the upgrade this does not work anymore and I get a message

WARNING: running xinput against an Xwayland server. See the xinput man page for details. unable to find device TPPS/2  ...

Score: 1
lovelinux avatar
Cannot boot Xen: secureboot forbids loading multiboot2 module
ma flag

I've installed xen-hypervisor-4.11-amd64, now I wish to boot Xen.

I can't. When I choose corresponding entry from grub I receive following message:

Loading Xen 4.11-amd64    
error: Secure boot forbids loading module from .../grub/x86_64-efi/multiboot2.mod
Loading Linux ...
error: Secure boot forbids loading module from .../grub/x86_64-efi/multiboot2.mod
Loading initial ramdisk ...
error: Secure bo ...
Score: 0
Adrian M avatar
xprintidle error, "screen saver extension not supported"
ye flag

I'm trying to use xprintidle for a python script but it always crashes when it tries to get the idle time.

Typing xprintidle into the terminal returns "screen saver extension not supported".

Running Ubuntu 21.04 in VirtualBox 6.1.26

Im fairly new to linux so I'm lost on how to fix this.

Anyone able to help?

Score: 0
Gigiux avatar
ubuntu avoid login after power save
eg flag

I have set power save after 15' of inactivity. The problem is that I need to log in again when I am back (for instance by moving the mouse). What is the way to avoid log in?


Score: 2
mpv error with mp4 files in Wayland: "VA error: wayland: Wayland roundtrip error: Protocol error (errno 71)"
jp flag

Ever since the 21.04 switch to Wayland, mpv has been saying:

[vo/gpu/wayland] GNOME's wayland compositor is known to have many serious issues with mpv. Switch to GNOME's xorg session for the best experience.

and yet has been working flawlessly (including with mp4 files). Until now. This new problem only seems to occur with mp4:

wl_drm@22: error 0: authenticate failed
VA error: wayland: Wayland ro ...