Hi,
It seems that recent wget versions (I'm running 1.19.1) redirect log messages to a file when running in the background. This causes the following messages when running the program:
This still happens with the current MakeMKV v1.10.10 linux(x64-release). Most problematically, when using using libmmbd with mpv, which has recently fixed spam from libbluray. This wget output (not to mention the garbage file creation) is the sole remaining eyesore. This seem beyond the control of the library user. Seems kind of dumb "feature" for wget to have, but the fix is confirmed here and should be easy enough to implement in makemkvcon.
Turning off the "Allow contacting web server for updates" under preferences does indeed stop the zombie wget processes.
However, it doesn't stop the zombie makemkvcon process which lock up my Blu Ray drive. I've seen this for years, running under multiple versions of Fedora Linux, currently I'm on makemkv-1.14.4-1.fc29.x86_64.
Only fix I've found, short of reboot, is to excursively use external DVD/Blu Ray drives. Turning the drive on/off clears the zombie makemkvcon process and I'm back in business.
Region 2 DVDs seem to cause this zombie state most often, and far more often when I try to read the disc in my BD-RE WH16NS40 drive, I have much better success reading region 2 DVDs in the Lenovo Slim XL34 drive.