matohak's questions

I have a touch screen laptop (Thinkpad X1 Yoga Gen 2, Ubuntu 20.04) connected to an external touch screen monitor. The touch screens' mapping don't work at plug-in so I followed this guide to map the input devices to the respective monitors. I've followed the guide and added a ~/.config/autostart/align_touchinput.desktop file to allow the mapping to be executed everytime I log in.

Here's my setup:

xinput
...
↳ Wacom Pen and multitouch sensor Finger touch  id=9    [slave  pointer  (2)]
↳ Wacom Pen and multitouch sensor Pen stylus    id=10   [slave  pointer  (2)]
↳ Wacom Pen and multitouch sensor Pen eraser    id=25   [slave  pointer  (2)]
↳ WingCoolTouch WingCoolTouch               id=18   [slave  pointer  (2)]
↳ WingCoolTouch WingCoolTouch               id=19   [slave  pointer  (2)]
....

xrandr
...
eDP-1 connected primary 2560x1440+3072+160 (normal left inverted right x axis y axis) 310mm x 174mm
HDMI-1 connected 3072x1728+0+0 (normal left inverted right x axis y axis) 344mm x 195mm
...

From the above, WingCoolTouch and HDMI-1 are from the external monitor. Thus I get my PC to run this script at startup:

xinput map-to-output 18 HDMI-1
xinput map-to-output 19 HDMI-1
xinput map-to-output 9 eDP-1
xinput map-to-output 10 eDP-1
xinput map-to-output 24 eDP-1

However, I'm facing two problems:

1. Every time when I wake up my laptop from sleep/screen turning off, the mapping always resets. Is there a good solution to this issue?
2. Because it's a laptop I often have to plug in the touch screen via a different USB port. This changes the id from xinput. From what I understand, xinput map-to-input allows mapping by device name. But my OS has detected multiple devices with the same name so it doesn't work (I get "Warning: There are multiple devices matching 'WingCoolTouch WingCoolTouch'" and an error). Is there anyway to map everything named WingCoolTouch to HDMI-1 so the mapping will work regardless of the USB port I use?

I'm using a Thinkpad X1 Yoga with dual boot Windows 10 + Ubuntu 20.04. Yesterday I installed imagick and rebooted my PC, and now I can't boot into Ubuntu because it shows a black screen with a single line /dev/nvme0n1p5 clean. xxx/xxx files. xxx/xxx blocks shown. I can't use ttyl (e.g. Ctrl+Alt+F1) either. These give me a completely black screen with using a typing cursor. I can boot into Windows 10 fine.

I'm trying to create a live Ubuntu OS on a 512gb SSD (mSATA drive inserted into a USB-interface housing). I've tried to create the live USB using several software (Universal USB Installer; Unetbootin) and file formats (FAT32/NTFS).

However, whenever I try to boot up the PC with the USB SSD it always says "Missing Operating System". Live USB works fine when it is installed into a 16gb pen drive but I somehow can't get it to work on the USB SSD. I wonder if anyone knows what is the reason behind?

Details are as follows:

• OS I have access to: Windows 10 (on another PC)
• OS to be installed: Ubuntu 18.04.3
• Motherboard: Gigabyte Z68P-DS3
• There doesn't seem to be anything wrong with the USB-SSD
• With LinuxLive USB Creator the USB SSD doesn't show up at all. (Is that because it is classified as a harddrive rather than a pen drive?)

Edit: I got pass the bug using Rufus. However, Rufus itself seems to have a bug which doesn't allow live USB with persistence for Ubuntu 18.04 LTS. As I wish to use the OS on-the-go, having a drive with no persistence would not be useful =(.

I have a USB flash drive that previously worked with my main PC running Ubuntu 18.04. A couple of days ago the flash drive is no longer visible in the Ubuntu OS. However, the flash drive still works perfectly on other computers, including another PC running Ubuntu 16.04 and Windows.

My main PC can still recognise other USB flash drives, just not that specific drive that I use (it is a mSATA drive boxed up with a usb connector).

I've tried:

1. lsusb, lsblk - no signs of the device visible on my main PC at all
2. Tried different USB cables and different USB ports on on the same PC.
3. Rebooting the computer

Any idea why is this happening? Is it just that my PC and that particular USB drive hate each other?

I'm currently accessing a computer (Ubuntu 18.04) from my home using Teamviewer. At least one of the two monitors is connected to the remote PC via DisplayPort. When I remotely access the computer, only one monitor is visible and therefore I can't use the dual screen function in TeamViewer. This is affecting my productivity.

(I think that's because the PC sometimes treat DisplayPort monitors as unplugged after they are switched off?)

Are there any easy way to work around this?

1) If not then can you please recommend another remote desktop software? Please note that I'm not able to reach the remote computer using due to limitation of the firewall. Only web-based remote desktop software works 2) I use this remote computer during the day so adding a headless monitor plug probably isn't a good idea.

I have a GTX 1070 on my Ubuntu 18.04 PC. I've previously tried to install nvidia drivers via a runfile using the command sudo ./NVIDIA-Linux-x86_64-418.43.run --no-opengl-files --dkms --no-drm but did not have uninstall it properly so now I can't do --uninstall. I cannot reinstall the runfile either. Trying to do so gives me:

The distribution-provided pre-install script failed!  Are you sure you want to continue?
-Continue Installation
ERROR: The Nouveau kernel driver is currently in use by your system. This driver is incompatible with the NVIDIA driver
-OK
WARNING: One or more modprobe configuration files to disable Nouveau are already present at: /etc/modprobe.d/nvidia-installer-disable-nouveau.conf ...
ERROR: Installation has failed. Please see the file '/var/log/nvidia-installer.log' for details.

And in the log file:

nvidia-installer log file '/var/log/nvidia-installer.log'
creation time: Tue Feb 26 08:56:40 2019
installer version: 410.93

PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin

nvidia-installer command line:
    ./nvidia-installer

Unable to load: nvidia-installer ncurses v6 user interface

Using: nvidia-installer ncurses user interface
-> Detected 12 CPUs online; setting concurrency level to 12.
-> Installing NVIDIA driver version 410.93.
-> Running distribution scripts
   executing: '/usr/lib/nvidia/pre-install'...
-> done.

I can't seem to install nvidia's drivers using apt either. Trying to install any versions and running nvidia-smi gives me: NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver. Make sure that the latest NVIDIA driver is installed and running.

And trying to purge nvidia with sudo apt-get purge nvidia* gives me an error:

Purging configuration files for nvidia-compute-utils-390 (390.87-0ubuntu0~gpu18.04.2) ...
Processing triggers for initramfs-tools (0.130ubuntu3.6) ...
update-initramfs: Generating /boot/initrd.img-4.18.0-15-generic
W: Possible missing firmware /lib/firmware/nvidia/gv100/sec2/sig.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/sec2/image.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/sec2/desc.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/nvdec/scrubber.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/sw_method_init.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/sw_bundle_init.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/sw_nonctx.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/sw_ctx.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/gpccs_sig.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/gpccs_data.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/gpccs_inst.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/gpccs_bl.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/fecs_sig.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/fecs_data.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/fecs_inst.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/gr/fecs_bl.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/acr/ucode_unload.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/acr/ucode_load.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/acr/unload_bl.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gv100/acr/bl.bin for module nouveau

I would really appreciate it if someone can guide me on fixing this broken installation without reinstalling Ubuntu.

Edit: I've managed to "completely" (as far as the log tells me) removed the runfile installation by reinstalling and --uninstall with the runfile. However I'm still getting all the lines "W: Possible missing firmware /lib/firmware/nvidia/gv100/sec2/sig.bin for module nouveau"

I was trying to install nvidia drivers for my PC for so that xorg will use intel drivers. I followed this guide and did an installation a runfile using the command:

sudo sh NVIDIA-Linux-x86_64-396.24.run --no-opengl-files --dkms --no-drm

https://forums.fast.ai/t/successful-ubuntu-18-04-with-igpu-for-xserver-and-nvidia-gpu-for-cuda-work-setup/20128

The method didn't work for me. And now I'm trying to uninstall nvidia's drivers with sudo apt purge nvidia*

Somehow after doing this, now whenever I try to install/uninstall something I get a message like this:

....
W: Possible missing firmware /lib/firmware/nvidia/gv100/acr/bl.bin for module nouveau
I: The initramfs will attempt to resume from /dev/nvme0n1p3
I: (UUID=1e612fb7-d1f4-4a4a-a5bd-1ae6761c9bf0)
I: Set the RESUME variable to override this.

And I can't even get the original nvidia driver to work. Any idea what the RESUME variable is? What is it that needs to be removed?

I'm using Ubuntu 18.04.

I've installed several programs in Ubuntu (eg. Matlab) and am trying to add them to the Launcher using Alacarte. "matlab" is in my bin path so I can launch the program with GUI in my terminal.

However, when the app is launched from the launcher only the splash screen comes out and then the main program seems to run in the background (I can see the program name after typing htop). Why is there such behaviour and what can I do to solve this?

I've tried setting (through alacarte) the launcher to launch /usr/local/bin/matlab, tried various combination with the "launch in terminal" box checked and unchecked.

Basically I am looking for a script to automate stuff (See picture below) in Ubuntu. I'm thinking of using a bash script but other solutions (eg. python?) would also be excellent.

1) Suppose I have a number of real directories "Folder 1" and "Folder 2" with subfolders and files. Assuming that files in the corresponding folders 1 and 2 have unique names. How can I create a new merged folder where each of the files are symlinks to the original folders?

2) The script should also offer an option to prune broken symbolic links in the merged folder.

The reason I want to do this is because I'd like to improve how my stuff are organised. eg. "Folder 1|2" might be data obtained in different chronological time points. Then I'd create Merged_Folder1, Merged_Folder2 etc for different projects without duplicating large files.

Edit: This question differs from this post as I would like to merge corresponding nested subfolders with the same names. The question in the previous post simply links the top directories under the sources to the target and cannot merge nested subfolders. Notice that in my case none of the folders would be symlinks, only the files are symlinks.

Edit2: I should have clarified that I wish the code to merge arbitrary levels of nested subfolders, not just two levels. Hence I've added "File J" and "File I" in the example illustration.

I'm trying to mount a drive from my work PC to my home PC using the command below:

sudo sshfs -o allow_other [email protected]:/ /mnt/home-pc

This command was working fine before. However, I've just re-installed the OS on my home PC. Now typing the command gives me an error "read: Connection reset by peer".

Any idea what is causing this? I can still ssh into my home PC after typing

"ssh-keygen -f "/home/work_username/.ssh/known_hosts" -R home.ip"

But somehow this sshfs still doesn't work. Both machines run Ubuntu 18.04.

I'm on 16.04 and would like to view two different sections of the same PDF in the same window. I know it is possible to open several instances of PDF viewer but that's rather annoying.

I've tried Foxit, Evince, Okular... and several others. It seems that none of them seem to offer this feature in Ubuntu. A bit of googling suggests Konqueror but I wasn't able to get it to work either...