AVM FRITZ!WLAN Stick AC860 in Debian Buster (10.0)

The FRITZ!WLAN Stick AC860 is a USB-WLAN Dongle compatible with WLAN AC (up to 866 MBit/s) as well as WLAN N (up to 300 MB/s).

 user@computer:~$ lsusb  
 Bus 002 Device 006: ID 057c:8503 AVM GmbH   

A number of websites state that the stick should work out of the box with Linux kernel 4.19. Debian Buster, released July 6th 2019, comes with a 4.19 kernel. Unfortunately the stick did not work out of the box.

• When attached to a USB-port of the keyboard, the device only connected in CD-ROM mode (an AVM gimmick for Windows set-up). When connected directly to the PC, no issue.
• The firmware was missing: mt7662u.bin and mt7662u_rom_patch.bin need to be installed in /lib/firmware/mediatek/ (and/or /lib/firmware/)

This resolved not yet all issues, as there were still error messages related to firmware loading and no wireless device appearing.

• Thus I compiled a current kernel: I am running now kernel 5.1.16
  I don't know which minimum version is required, as I did not test any kernel versions inbetween. A wireless device appeared in the NetworkManager and Wifi-Networks were visible, yet no connection was feasible.
• Adding the following line in /etc/NetworkManager/NetworkManager.conf solved this last problem:

  [device]
  wifi.scan-rand-mac-address=no

Aladdin eToken PRO USB 72k Java on Debian 9 "Stretch"

The token is known as

 user@computer:~$ lsusb  
 Bus 001 Device 006: ID 0529:0620 Aladdin Knowledge Systems Token JC  

Installing the vendor provided SafeNet Authentication client (version 9.0.43) alone was not sufficient. Both provided binaries "SACTools" and "SACMonitor" failed with

CRYPTO/Crypto.c:247: init_openssl_crypto: Assertion lib failed.

pavebul over on github has found the solution. The SafeNet software is looking for the openssl lib in the wrong place. His solution which worked also for me:

 sudo ln -s /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.2 /usr/lib/libcrypto.so.6  

Logitech Quickcam Express in Debian installieren

Webcam:
$ lsusb
[...]
Bus 001 Device 003: ID 046d:0870 Logitech, Inc. QuickCam Express
[...]

Installation (qc-usb-utils ist nicht unbedingt notwendig)
(Als root, mit sudo scheint es Probleme zu geben...)
# aptitude install qc-usb-source qc-usb-utils
# cd /usr/src/modules/qc-usb/
# make
# make install
# insmod quickcam.ko

oder viel einfacher und besser:

 m-a get qc-usb

 m-a build qc-usb

 m-a install qc-usb

statt der oben genannten Befehle.

oder am einfachsten nur:

 m-a a-i qc-usb