gnome – Ubuntu 18.04 crashes due to a startup application

I am new to Ubuntu and have run Ubuntu 18.04 LTS Dual Boot with Windows 10.

I've just installed touchegg and added it in startup applications like this:

After the restart, the desktop will not open as soon as I want to log in. there black screen with the message: "Error loading /home/$user/.xprofile found:"

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Is there a way to prevent the application from running at startup or to prevent the crash? Any help is appreciated.

Ubuntu 18.04 boot error ucsi_acpi USBC000: 00: PPM init failed (-110)

I bought a new laptop a few days ago. I installed Ubuntu 18.04 Dual Boot. After a while I tried increasing the Ubuntu memory, but when I connected the live USB port with Ubuntu inside when I choose "Test Ubuntu without installation" my screen goes black but I hear the Ubuntu in Running background. Then I turn off the laptop and reboot it, but if I decide to boot Ubuntu, I get the error "error ucsi_acpi USBC000: 00: PPM init failed (-110)" and can not log in to Ubuntu. I updated the BIOS but nothing happened. What can I do?

Software Installation – The paintsupreme 3d application does not run on Ubuntu 18.04

I've updated Ubuntu, retested, and nothing, it's not working, it's only going to run, but in the end it's not working. When it tries again, it does not even try to execute it.
When I try to run it from the console, I get the following error message (the original message is in Spanish, sorry if the translation is wrong):

user@pc:~$ paintsupreme-3d
No schema files found: doing nothing.
/snap/paintsupreme-3d/2/bin/desktop-launch: line 204: 11020 Segmentation fault (core dumped) $RUNTIME/usr/lib/$ARCH/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders > $GDK_PIXBUF_MODULE_FILE
"trap" for stop/tracking point (generated core)

I found that the user reported a similar issue to Nexus on October 24, but still has no answer. I hope I do not violate any of the rules of this great community.
Thank you in advance for your valuable help.

Ubuntu 18.04 USB Audio No Output SMSL su-8 AND xDuoo HD-5

Lenovo W540
My external monitor's internal speakers and speakers work (HDMI), but none of my external USB DACs (SMSL SU-8 and xDuoo HD-5). This was not a problem until recently when I got updates from Ubuntu. I also have Windows updates and Lenovo updates. I am not sure which update has interrupted the sound. It may sound strange that a Windows or Lenovo update affects Ubuntu, but booting Windows interrupts my Bluetooth mouse connection in Ubuntu. Sigh.

The system seems to respond adequately when the devices are displayed in the "Settings" and the SMSL indicates that the sample rate is set to 48kS / s when connected (and nosig if not connected) and so on. However, sending sound through does not result in output. I get a good output on Windows, so it's no problem with the DAC hardware. I get a good output on the laptop speaker and the HDMI output speakers of the external monitor.

I tried TLP to prevent the device from being paused. I'm not sure if I did it right, but looking at the Pactl output does not indicate that the USB / DAC devices behave differently than the (working) HDMI devices.
otherwise "suspended" or "idle").

I am lost. Looking for suggestions

Other Noteworthy Things: In the past, I've tried (and apparently failed) to set up MPD and other things to send DOP / DSD to my DAC. Despite my mistakes setting up DOP / DSD, the USB DAC buzzed perfectly, and standard PCM was sent by Firefox or Clementine or whatever.

thank you in advance

System Installation – Install Ubuntu 18.04 to USB for use on multiple PCs, nvidia, and Intel GPU drivers

What options are there when installing Ubuntu 18.04 on a USB stick, if you want to install several PCs?

A PC is Intel CPU with high-end NVIDIA GPU. Another PC is an Intel CPU with two NVIDIA Quadro k2200 GPUs, one suitable for display and the other for mathematical use with Cuda or the like. Another laptop is Intel CPU, but old NVIDIA Quadro FX3600M. These are the specifics, but no specific response is required. It is the general problem when multiple GPU drivers are needed (and other drivers naturallu ..)

The goal is to install a USB stick that can be used on all these and all sorts of other PCs. Maybe the GPU had to be optimized for at least one PC and just had to be able to work on the other.

I've seen some pretty complicated ways to do that. Not interested. Must be easy to do, if not good to know, and I prefer multiple USB installations.

18.04 – Only 1 in 4 websites is accessible outside the network?

I hosted 4 websites on the same PC, this morning I found out only one of them that can be accessed from outside. I mean, I can see internally, but I can not see it on my mobile network. Only one of them is accessible (it is one of two with SSL enabled, the other with SSL is also inaccessible).

I reset ufw, turned off the router's firewall, so far nothing worked. I can not imagine why only one would work and some would not.

To                         Action      From
--                         ------      ----
443/tcp                    ALLOW       Anywhere                  
Apache Full                ALLOW       Anywhere                  
80                         ALLOW       Anywhere                  
OpenSSH                    ALLOW       Anywhere                  
443/tcp (v6)               ALLOW       Anywhere (v6)             
Apache Full (v6)           ALLOW       Anywhere (v6)             
80 (v6)                    ALLOW       Anywhere (v6)             
OpenSSH (v6)               ALLOW       Anywhere (v6)     

In the router, both 80 and 443 are translated into 80 and 443 (end). In addition, all sites are turned on apache2 (as I can see them on my local network). I do not know what further information I should give here. Thank you in advance.

18.04 – The touchpad does not work anymore after the kernel update to 4.15.0-72-generic

The touchpad on my laptop did not work anymore after an automatic kernel update to 4.15.0-72-generic. My only remedy at the moment is to start with the previously installed kernel (4.15.0-70). Where should I report this error to hope it will be resolved, and what information should I include?