So you've got:
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kernel-firmware-20160823git-noarch-1_slack14.2
kernel-headers-4.4.19-x86-1_slack14.2
kernel-huge-4.4.19-x86_64-1_slack14.2
kernel-modules-4.4.19-x86_64-1_slack14.2
This means that you still have the kernel from the installation medium in use. Even if you have agreed to update the installed packages through Gslapt, the kernel is not automatically handled in the process.
It is better, if not necessary, to install the latest kernel provided for Salix 14.2.
You can use the following two commands to update the kernel to the current state.
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sudo slapt-get -u
sudo slapt-get --install kernel-huge kernel-modules kernel-headers kernel-firmware #kernel-source
If you want to have the kernel sources additionally installed, then remove the comment sign in the line shown -- the sources are usually not necessary.
If you have installed on a non-(U)EFI machine or a machine in legacy bios mode, you will probably use LILO as boot loader, it can be told to install a new boot loader after a kernel change by the following command:
If you use the (U)EFI instead, then a different boot loader/manager comes into play, and you must use its mechanism to communicate the kernel change.
Opera:
papa wrote: ↑21. Jan 2022, 17:04
In a terminal, Opera and Opera-developer gives the message "command not found".
Probably the command must be written in lower case. However, it is also possible that the command is written differently. Command names do not have to match the package name. By the way, I wrote "call opera from the command line", Opera in lower case.
papa wrote: ↑21. Jan 2022, 17:04
Hidden files ~/.xsession-errors or ~/.xfce4-session.verbose-log do not exist on my computer.
The command line:
does not show the two files?
opera 75.0.3969.93 is the stable version in Sourcery, uses the free HTML renderer Blink; this is the Opera you probably want to use.
opera-developer 76.0.3995.0 is the development version in Sourcery, you can use it if you can live with instabilities.
opera-legacy 12.16.1860 is old and uses Presto, a proprietary HTML rendering engine.
The ffmpeg-codecs extensions are probably superfluous. However, I do not know exactly.
There is a brand new version: Opera (Linux) 83.0.4254.19, but not yet in Sourcery. It can be found as a DEB package on the web. One could perhaps create a TGZ package for Salix and Slackware from it.
Gscan2pdf:
papa wrote: ↑21. Jan 2022, 17:04
For scanner software, Xsane and Simple Scan works great. Only Gscan2pdf do not work. This is a second mystery!
The discussion I linked to describes the solution. Please read it. No mystery there at all.
Addendum:
Belatedly, I have realised the mistake you are making:
papa wrote: ↑21. Jan 2022, 17:04
The first two install successfully but clicking on the Internet menu selection does not work. Opera legacy also installs successfully and works fine. It's a great mystery!
The three Opera packages mentioned have different package names, but will have exactly the same names as a command, probably "opera" in lower case.
So if you install three different packages one after the other, only the last one will completely remain. The previous two have been completely or partially replaced.
You can have several commands with the same name at the same time, but it does not work the way you imagine.
My recommendation to try to correct the mess is: Start Gslapt and search for the remaining Opera package. Remove it, reboot and install the one you want. This will probably solve the problem. Installations made via Sourcery are subsequently visible as packages in Gslapt.