Thulashitharan D's questions

I have an android vm.I use qemu along with virgl for hardware acceleration.I had to build qemu from source for sdl and virgl support. I used the following build parameters

./configure --enable-sdl --enable-opengl --enable-virglrenderer --enable-system --enable-modules --audio-drv-list=pa --target-list=x86_64-softmmu --enable-kvm --enable-gtk --enable-spice

My build directory is

/home/username/builds/qemu/qemu/build/

My VM launch options are

./qemu-system-x86_64 -boot c -enable-kvm -smp 1 -name android -device virtio-vga,virgl=on -net nic -net user,hostfwd=tcp::4444-:5555 -cpu host -device ES1370 -m 1028 -display sdl,gl=on -hda /home/username/Documents/android.img -usb -usbdevice tablet -machine q35 -object rng-random,id=rng0,filename=/dev/urandom -device virtio-rng-pci,rng=rng0

I would like to connect to my VM and host using kde connect.I assume that requires setting up a bridge and tap ,tun stuff.It would be nice if some one could suggest a easy method to do the above. My ifconfig output

username@username-H81 ~ [1]> ifconfig
enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.40  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::7288:16a8:48fe:99e4  prefixlen 64  scopeid 0x20<link>
        ether 00:e0:4c:c2:08:55  txqueuelen 1000  (Ethernet)
        RX packets 684976  bytes 626450094 (626.4 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 215101  bytes 23434472 (23.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 83058  bytes 67059421 (67.0 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 83058  bytes 67059421 (67.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

My host system - Kubuntu 20.10
Guest - android9 from android x86 with kernel 4.9

I placed my latte dock panel on top of the screen with auto hide enabled. Once this panel auto hides it does not reappear back.

• My layout can be found here.
• Dock Version 9.86
• Kubuntu 20.10

Update(Tuesday, 8 December, 2020)

• Dock does not face this issue only panel does.
• placing the panel on left or right hand side does not solve the issue.

I have Ubuntu 20.10. I am trying to install Handbrake from its ppa. when i added handbrake repositories and ran sudo apt update i got the following message

Ign:11 http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu groovy InRelease
Err:12 http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu groovy Release
404 Not Found [IP: 91.189.95.83 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu groovy Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I went to the repository and tried to manually search for groovy packages and found none but there was a focal fossa package.What should i do?
BTW

• snap packages are outdated
• I am facing the same issue for other software also.(eg - f.lux...many more)

Edit

Every time i boot into my kubuntu i run

sudo mount -t ntfs-3g /dev/sda3 /home/username/Ntfs/C/
sudo mount -t ntfs-3g /dev/sda4 /home/username/Ntfs/Other/

I wanted to automate it hence i used sudo crontab -e and added the line @reboot /home/username/Ntfs/Mount.sh to it

Then in konsole i ran sudo chmod 777 Mount.sh at /home/username/Ntfs/Other/ dir

Contents of Mount.sh is as follows sudo mount -t ntfs-3g /dev/sda3 /home/username/Ntfs/C/ sudo mount -t ntfs-3g /dev/sda4 /home/username/Ntfs/Other/ exit 0
Questions

• is it okay to mount ntfs drives inside my home dir......most guides suggested to mount them in /mnt/ dir
• is it necessary to put exit 0 at last of my script.
• because my script will anyway be executed with root privileges should i use sudo mount in the script also?
• why do we use the argument -t with mount

Before installing cuda toolkit.I had about 25 gibibytes of free space on my root directory.After installing cuda using deb(network installer) and a manual reboot after installation I noticed that only about 15 gibibytes of free space disk space was available in root dir.As cuda toolkit usually occupies only about 5 gibibytes of space i assume the installer probably failed clean itself up(2*5GiB=10GiB).Advise me on how to rectify the issue.

The following commands did not help sudo apt-get autoclean sudo apt-get clean sudo apt-get autoremove
PS:I installed cuda so that i can render blender scenes with my gpu.is it necessary to install the entire toolkit for this purpose?

I recently installed zoom on my ubuntu 20.10.by mistake i deleted its update repository using softwere and updates.how can i get the repository back without reinstalling to the softwere. is it possible extract that update repository from zoom.deb installer file.?