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@superman Yes, with "noswap" and with NOT "nozram", zram is used for swapping.

knoppix@Microknoppix:~$ free -h
total used free shared buff/cache available...

I have omitted knoppix64 and nostartsound cheatcodes. But the "nozram" is necessary. (Maybe because of my hardware?)
My test results: (20 boots in both cases)
1)


menuentry...

Thank you. I use only live systems run from ISO files with manually installed GRUB2. Reading your post I found the solution. I should have used linux64 (instead of linux) in my grub.cfg file. By this...

My boot is quite different. On my HDD there is not installed any OS. I use only live systems (mainly Knoppix in live mode) run from ISO files copied to HDD. The boot is provided by an installed GRUB2...

My Dell N5040 notebook had 2GB phisical memory. Yesterday it was added more 2GB.

root@Microknoppix:/home/knoppix# dmidecode -t 17
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.6...