ACPI Error in the Console on screen with Ubuntu Server 21.04

We have buy a new Shuttle XPC Nano NC10UXA. But after install Ubuntu Server 21.04 i have every second a ACPI Error on the screen. This is very annoying you can not enter anything because immediately comes a new error message and overwrites the input. We have therefore contacted the manufacturer and he recommends disabling acpi in /etc/default/grub (GRUB_CMDLINE_LINUX_DEFAULT="acpi=off"). When we make this adjustment, the error disappears. But the computer no longer shuts down properly when the power button is pressed. It simply shuts down.

Is there no more useful solution here?

ACPI BIOS Error (bug): Could not resolve symbol (_SB.PCIO.GLAN.GPEH), AE_NOT_FOUND (20201113/psargs-330)
ACPI Error: Aborting method _GPE._L6D due to previous error (AE_NOT_FOUND) (20201113/psparse-529)
ACPI Error: AE_NOT_FOUND, while evaluating GPE method (_L6D) (20201113/evgpe-511)

How to use the default Yaru Gnome-Shell theme on Ubuntu 21.04 in a Gnome session?

I did a fresh Ubuntu 21.04 installation, installed the Gnome session (sudo apt install gnome-session), restarted, selected Gnome (tried Wayland and X11) in the login window (where you have to enter the user password to log into the system), installed Gnome-Tweaks (sudo apt install gnome-tweaks) and Gnome-Extensions (sudo apt install gnome-shell-extensions) in order to be able to change the Gnome-Shell theme.

But to my surprise, the dropdown for the Gnome-Shell theme in Gnome-Tweaks shows only Default (this is the Adwaita theme, because I’m using the Gnome session) and Yaru Light.

If I change to the Ubuntu session at startup, I see the same two entries, but the Default theme is now Yaru (the dark version), because I’m in the Ubuntu session.

My question is: Is it possible to use the Yaru Gnome-Shell theme (the dark one) under the Gnome session in Ubuntu 21.04? If yes, then how, preferably without using additional resources, because the Yaru Gnome-Shell theme is already installed, but can’t be accessed?

boot – Dual booting Pop OS 21.04 and Windows 10

So I had a working Windows 10 install on 1 SSD and I’ve installed Pop OS 21.04 on another separate SSD.

Since installing Pop I’m unable to boot back into windows.
The drive windows is installed on uses GPT partitioning.
The drive pop os is installed on is MBR

I’ve tried os-prober from pop-os and it doesn’t see the windows installation.
I’ve tried using the windows install media to do startup repair and it doesn’t find anything to do.

What other things can I try. I can reinstall windows if necessary, if it is necessary is there a guide to doing somewhere that takes account of the systemd booting I believe pop-os has switched to that means I will be able to dual boot? Including how to match the partition and install types?

I had some experience using grub to dual boot from a quite a few years ago and am not unfamiliar with the linux shell but I haven’t been trying to dual boot for many years so am fairly rusty.

kernel – Ubuntu 21.04 reboots itself, sometimes hibernates

So, I’ve been having this problem for a while, since 18.04 I guess. My computer reboots out of nowhere. It is really, really random. The only thing I’ve noticed is that it only happens when my CPUs are idle, it never happened while I was working on something or playing. Also, sometimes it doesn’t reboot, but my screen goes entirely black and it never comes back, so I have to force the shutdown by pressing the button down. I’ve read many posts on that issue, but nothing worked. My system is:

— Dell Inspiron 5675;

— Kernel Version: 5.11.0-25-generic;

— Graphics Platform: X11;

— Processors: 16 × AMD Ryzen 7 1700X Eight-Core Processor (64 bit);

— Memory: 7,7 GiB of RAM;

— Graphics Processor: AMD Radeon ™ RX 470 Graphics

Also, I’m using KDE Plasma as the desktop environment:

— KDE Plasma Version: 5.21.5;

— KDE Frameworks Version: 5.80.0;

— Qt Version: 5.15.2

What system log would be more helpful? I’ve run the command journalctl and found some ACPI error messages there. Anyways, thanks in advance. Any necessary information, I’ll be more than happy to provide!

suspend – Error when suspending MSI 65 Stealth, Ubuntu 21.04

When I suspend my laptop and turn it back on it looses wireless connectivity and its unable to recognized my external monitor,

When I reboot the computer the wireless connection goes back on but to get the monitor working I have to go the bios and enable and disable the secure boot for it to start working,

any ideas why this problem might be showing up?

Computer MSI Stealth 65
Dual Boot = Main Windows 10, secondary Ubuntu 21.04

permissions – problem installing searx on ubuntu server 21.04

im trying to install searx on my ubuntu vps server but when i run ./utils/ according to the official documentation

i get this error

ls: cannot access '/home/test/searx': Permission denied

ERROR: ./utils/ line 385: user ‘searx’ missed read permission: /home/test/searx

what command would i run to fix this? thank you for any help

nvidia – How do I install cuda for Ubuntu studio 21.04?

  • OS: Ubuntu studio 21.04.
  • GPU: GeForce GTX 980

Its an operating system that has pre-installed software like the animation software called blender.
I downloaded the operating system here:

But when I try running blender, it tells me I cant use the graphics card because of a cuda software issue so it will use the cpu instead. My graphics card is a GeForce GTX 980 and I know that its compatible with cuda by running the command

lspci | grep -i nvidia

After I ran that command, I get: 2d:00.0 VGA compatible controller: NVIDIA Corporation GM204 (GeForce GTX 980) (rev a1)
So im assuming that means it should work because it has the word compatible in the sentence.

When I go to the cuda website it says that the latest supported ubuntu version is
Ubuntu 20.04.2 LTS, not the 21.04 version I have..

The tutorial I found online didnt work for me.

Does anyone have a working method of installing cuda on Ubuntu studio 21.04?

linux – Ubuntu 21.04 second screen issue

A few days ago ubuntu restarted unexpectedly and after rebooting the second screen was not recognised at all. It has been working for some weeks without any problem and it is plugged through HDMI.

After browsing the web I found a quick solve using this command.

$sudo dpkg-reconfigure LightDM
it opens a screen with following options

  1. LightDM
  2. gdm3
  3. lightdm

It was setted up to gdm3 and I changed it to lightdm
After switching to lightdm the second screen is working again, when I plug it in it seems is working but it is really laggy. Tabs take ages to open, webcam is really slow and cuts the video. Typing takes a lot of time to appear on the screen. Switching between tabs is incredibly slow… It does not work at all even though it looks like it is.

So I decided to try setting up back to gdm3 and despite monitor is being recognised as well, it shows up just half screen and I cannot see the bottom part.As well as if I use the other option LightDM.


I have also tried to change nvidia driver version but computer got blocked while installing them…

Do you know how can I fix this? or at least what the problem is so I can browse the internet for a solution???

Thanks in advance

Upgrade from 20.10 to 21.04 fails with “Authentication failed”

upgrading fails on my machine (same using the Software Updater) with:

goetz@Ubuntu-Mac:~$ sudo do-release-upgrade 
Checking for a new Ubuntu release
Get:1 Upgrade tool signature (819 B)                                                                                      
Get:2 Upgrade tool (1.276 kB)                                                                                             
Fetched 1.276 kB in 0s (0 B/s)                                                                                            
authenticate 'hirsute.tar.gz' against 'hirsute.tar.gz.gpg' 
Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server.

Does anyone have an idea how to solve this?

Please find below my sources.list:

goetz@Ubuntu-Mac:~$ cat /etc/apt/sources.list
# deb cdrom:(Ubuntu LTS _Focal Fossa_ - Release amd64 (20210209.1))/ focal main restricted

# See for how to upgrade to
# newer versions of the distribution.
deb groovy main restricted
# deb-src focal main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb groovy-updates main restricted
# deb-src focal-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb groovy universe
# deb-src focal universe
deb groovy-updates universe
# deb-src focal-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb groovy multiverse
# deb-src focal multiverse
deb groovy-updates multiverse
# deb-src focal-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb groovy-backports main restricted universe multiverse
# deb-src focal-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb focal partner
# deb-src focal partner

deb groovy-security main restricted
# deb-src focal-security main restricted
deb groovy-security universe
# deb-src focal-security universe
deb groovy-security multiverse
# deb-src focal-security multiverse

# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.

-Best regards, ii7017-

networking – How to disable 802.11ac on Ubuntu 21.04?

I want to know how to disable the 802.11ac in Ubuntu 21.04 on my laptop.
I’m new to Ubuntu,my laptop has an Intel AX201 wireless card,which supports 802.11ac.But I don’t want to use the 5GHz signal because my room is far from router and the signal is weak.I tried to google this question,but got no answer.
The infomation of my card:

# lshw -class network
       description: Wireless interface
       product: Comet Lake PCH CNVi WiFi
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       logical name: wlo1
       version: 00
       serial: 40:ec:99:f3:ed:91
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-22-generic firmware=59.601f3a66.0 QuZ-a0-hr-b0-59.u ip= latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:16 memory:c551c000-c551ffff