MX Linux Forum

I owe one more commentary on this topic:
The problem was solved a year ago - kind of. After that my internet connection was interrupted re-established while working too many times which became really annoying.
The problem was the cable as Mr. timkb4cq correctly pointed out. The final solution - NEW ...

Thank You, timkb4cq, You are absolutely right - I've just used the command You provided and after reestablishing a connection full speed is back! So no more disconnecting the cable :-)

Thank You timkb4cq, I'll try that.
What puzzles me is if I reboot to Windows OS after having this problem, I have a normal speed.

I owe a comment - there is a temporary solution to my problem (I've just recently noticed). when my download speed drops from 100 to approx. 10 Mbits i simply disconnect the cable and reconnect it and by some magic the speed is back at it's normal values. After about 10 sessions I repeat the routine ...

Thank You both for Your patience with me.
I haven't removed PCLinuxOS just yet, but I am back to MX boot menu with MX booting first.
So next time I install another distro and want to restore MX boot menu I just repeat the steps You kindly provided me - I hope I don't bother You again with the same ...

Thank You all for help!
Huckleberry Finn, when I use "Sudo efibootmgr" I get:
BootCurrent: 0003
Timeout: 1 seconds
BootOrder: 0003,0001,0002,0000
Boot0000* ubuntu
Boot0001* MX19
Boot0002* Windows Boot Manager
Boot0003* pclinuxos

So now I have to boot from live USB (MX KDE) system and install it to ...

And when installing any system I didn't change any parameters - everything by default (apart from choosing the partition, local settings, of course). But since I installed MS Windows first, there may have been UEFI already there

Thank You fehlix, I appologise, I forgot my sys. info
There it is:

System:
Host: <filter> Kernel: 5.10.0-5mx-amd64 x86_64 bits: 64 compiler: N/A
parameters: BOOT_IMAGE=/boot/vmlinuz-5.10.0-5mx-amd64
root=UUID=<filter> ro quiet splash
Desktop: KDE Plasma 5.14.5 wm: kwin_x11 dm: SDDM ...

Thank You both for Your answers!
Well, asqwerth, I've tried what You suggest - changed the boot order in BIOS and instead of going back to MX boot menu I get the message:
Welcome to GRUB!
error: file '/....." not found
grub rescue>_
and at this point I don't know what else to do than go to BIOS ...

I have a multiple partitions on my SSD disk besides MX KDE I installed Windows 10 (first) , later I've tried MX Xfce also and after that I installed PCLinuxOS (on the partition where I had MX Xfce before). Now I have a boot choices with PCLinuxOS. I will most probably soon stop using it soon (format ...