Latest Ubuntu related questions

Score: 0
Daniel Krajnik avatar
How to rollback entire system and not particular datasets?
in flag

I run zfs rollabck rpool/ROOT/*****@autozsys_hash on all datasets for one particular hash and it completely broke the system. I haven't recovered it yet, but I figure that this must be incorrect way of rolling back the system or is it? Does one need to run this command on each one of the dozens datasets separated on ubuntu? I think that it is a good idea to separate them, but does rolling back req ...

Score: 1
cabonamigo avatar
Why a raw listening socket on port 255 keeps opening up and closing in random interval?
br flag

A random listening raw socket keeps opening up and closing in random intervals on port 255.

Running "ss" in the shell with this line, when I was testing for something else :

sudo ss -eoinlp state fin-wait-1

gave me this output:

Netid   Recv-Q  Send-Q  Local Address:Port  Peer Address:Port  Process         
???     0       0       0.0.0.0:255         0.0.0.0:*          ino:46774389 sk:6c99 <-> ...
Score: 0
error processing package nvidia-340: I've fixed the problem but I can't use apt-get
rs flag

I'm a bit newbie with ubuntu and I'm trying to use it in a really old laptop with hybrid video using an old NVIDIA GeForce 310M

after install and reboot I get a black screen so I had to reboot using nomodeset, after some research I found that I need install nvidia-340 and nvidia-prime (I found this in an old article)

sudo apt-get install nvidia-340 nvidia-prime

this doesn´t work because this can't ...

Score: 0
antogeo avatar
Display looses resolution in Ubuntu 20.04.3 LTS if monitor switch is not connected to another pc
in flag

I have a fresh installation of Ubuntu 20.04.3 LTS in a desktop which shares the screen with my laptop via a monitor switch. I have a set a custom resolution using

cvt 1680 1050
# 1680x1050 59.95 Hz (CVT 1.76MA) hsync: 65.29 kHz; pclk: 146.25 MHz
Modeline "1680x1050_60.00"  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync
xrandr --listactivemonitors 
    Monitors: 1
     0: +*DisplayPo ...
Score: 0
Network Manager no longer shows wired ethernet (Realtek 8168)
as flag

Sometime yesterday I lost my wired ethernet network connection. It no longer appears in network manager, nor does it seem to be active in ifconfig, though the wireless adapter is.

Possible clues: This seemed to happen shortly after a network-manager (1.22.10-1ubuntu2.2/3) update, but there was also a kernel update (5.4.0-97.110) and system76-driver (20.04.47~1641830102~20.04~12f1c0f~dev, 20.04.48~164375 ...

Score: 0
shivani avatar
How can I get hcitool/bluetoothctl to recognize my OpenBCI bluetooth dongle?
cn flag

I am trying to use an OpenBCI dongle on Ubuntu 20.04.3, the eventual goal being to integrate with ROS (Robot Operating System) and use it as part of a larger system. To do this I need the hci number of the bluetooth dongle, but hcitool dev shows only an empty Devices:.

Typing lsusb shows

Bus 003 Device 008: ID 0403:6015 Future Technology Devices International, Ltd Bridge(I2C/SPI/UART/FIFO)

and th ...

Score: 0
Run apps with redirection from within a shell script
br flag

I have a watchdog script that runs applications listed in a file. I want to be able to run the applications as entered in that file. Currently I am just looping thru the file and running them in the background if there is no pid associated with those apps, I simply run app with (list_Entry &) to allow all arguments that app might have and redirections of I/O intact. While arguments are working prope ...

Score: 0
Splendour avatar
some of my apps takes too long to open from terminal, sometimes they don't even open at all on ubuntu 21.10
ke flag

for instance, when I ran this command: $ wine winecfg

I got this error msg after waiting for a long time: 0158:err:environ:run_wineboot boot event wait timed out

What might be the problem?

Score: 0
How do I get a live USB install without the install prompt?
co flag

I have a Ventoy drive with a handful of ISOs for testing purposes. Since it's for testing and troubleshooting systems, it's useful for reaching the desktop to be quick. For my use case, the prompt to either install or try Ubuntu is unnecessary. I've looked online a bit, but all answers are for older versions or just say to click 'try'.

If anyone knows how to do what I'd like with Ubuntu 21, I'd a ...

Score: 0
Ubuntu VM in Hyper-V Gen2 will not boot consistently
bq flag

I have a Hyper-V virtual environment (I know, I know) in Windows Server 2019. This environment handles mostly Windows guests, but has a handful of linux machines, including two gen2 guests running Ubuntu 18.04 LTS.

My problem is these two guests often fail to reboot properly. When they start I can see the grub menu to select a kernel, and no matter what option I pick I'll see this (with the appro ...

Score: 1
FicusMacrophylla avatar
Permission Problem with RAID1 device
tn flag

I'm experiencing some trouble with an home server (Ubuntu 20.04.3) that I have put on.

My configuration: 1 Software RAID1 (mdadm) that is mounted via fstab to /media/altocasa/NetDisk1

I have also activated a samba share to share a folder on that disk. The other folders on the disk are dedicated to various services: -owncloud -transmission -calibre -kodi

My problem is about...permissions! That's because ...

Score: 0
Combo headphone/microphone splitter does not work on Ubuntu 20.04, individually plugging in headphone or microphone does
bn flag

So I can plug either my external lavalier microphone Boya By M1 or my headphones directly into my Dell G7 7588 laptop's single 3.5mm jack, and they both work.

I purchased this microphone and headset combo jack which splits the single 3.5mm jack on my computer into a headset output and a microphone input. Sometime ago it was working fine, but now I cannot get the microphone to work through it. Not ...

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