That Guy's questions

I know similar questions have been asked and answered here, but my issue is different: I want to get rid of screen tearing staying with the nouveau Xorg driver, not with NVIDIA proprietary driver.

The reason is that my notebook (Asus G75VW) is peculiar in having only Nvidia GPU (no Intel GPU on board). As a result, when using dual monitor setup (with external monitor attached via display port), the GPU temperature quickly rises to 50 degrees even in idle state (no movies/games), and after that point the GPU fan speeds up, yielding that annoying noise... Well, that was back a while ago when I had MS Windows installed, so I used a single external monitor. Recently I switched to Ubuntu 18.04 and - heavens! - my notebook became much less noisy in dual-monitor setup, as the GPU temperature hardly reaches 43 degrees even when an HD movie is run on external monitor!

One problem though: screen tearing while playing videos. I found the solution at SE: in nvidia-settings turn on the option Force composition pipeline. For this to work, I obviously had to switch to proprietary Nvidia driver from the nouveau driver which was used by default. And - voila! - the temperature-an-noise problem is back again. By the way, simply switching to proprietary driver does not solve screen tearing; additionally enabling force composition pipeline removes screen tearing indeed. The GPU temperature becomes high even without enabling it.

So I would like to stick with the nouveau driver but to get rid of screen tearing. Thus far, I tried compton instead of the xfce4 native window manager, both with xrender and glx backends, but that didn't solve screen-tearing issue.

[Alternatively, since I don't play games, I might consider using Nvidia driver but tweak GPU to minimize its load and hence temperature. I investigated options available in nvidia-settings and found only few that I could change; they made no difference; could there be something I have missed, though?]

I've configured a two-seat setup with Xubuntu 18.04. The only problem is that when user logs out on either seat, the greeter then picks (seemingly) randomly the username for the next login. Since the two seats are typically used by the same two persons, in most cases they have to choose their usernames before entering passwords. What I want is that on each seat, the greeter would show by default the username of the user who was last to use this seat.

Currently, the contents of /usr/share/lightdm/lightdm.conf.d/60-xubuntu.conf is the following:

[Seat:*]
user-session=xubuntu
greeter-show-manual-login=true

P.S. I found in docs how to make autologin of a specific user on a specific seat. This is not what I want. I only need to suggest the specific user on a specific seat, not to autologin that user.

At Okular's webpage I see that its latest version is 1.2, released in August 2017. In my Ubuntu 16.04 I have Okluar, which says in its About section that it is version 0.25.0. If I try to update Okular in command line, it says okular is already the newest version (4:16.04.3-0ubuntu1~ubuntu16.04~ppa62). At Okular's webiste they just say "For GNU/Linux and the BSDs use the package manager to find the Okular package", which I did. Is this because ubuntu repositories still don't have updated version of Okular?

Using Ubuntu 16.04. I like Krusader, but can't figure out how it is possible to change date/time format for the Modified column. I truied to change system regional settings, but Krusader ignores them (while, e.g., Midnight Commander uses system settings). Switching application language (in Help menu) also does not affect the date/time format. I like the 24-hour format, not PM/AM, and I may prefer even to hide time, and leave only date. Is that possible in Krusader?

The other post is of no help, as there is no even such file in mys systems as ~/.kde/env/setlocale.sh