Did you try the options in:
File Manager PCManFM > Edit > Preferences > Volume Management > Auto-mount
Unlike all previous versions, 7.6 doesn't automatically mount CDs. I have to type "mount /media/sr0".
Did you try the options in:
File Manager PCManFM > Edit > Preferences > Volume Management > Auto-mount
That doesn't help.
Ok, found the problem. You have to add kernel option:
block.events_dfl_poll_msecs=1000
Looks like a strange command to me but if it works ...
Looks to me like more Linux gibberish. Sure, Linux experts enjoy saying to noobs "you just have to add a kernel option". It certainly demonstrates their superiority and better understanding. But many average users have no idea exactly how you "add a kernel option". It isn't hard to understand why Linux is still marginalized on the desktop.
---
Verifying of md5 checksum and burning a CD at slow speed are important.
At least it's an easy fix, just add it to syslinux.cfg (assuming your knoppix is on a USB stick).
My Knoppix 7.7.0 is a LiveUSB on a Dell Inspiron which has a r/w cd/dvd drive in it.
This implies legacy boot and a remote possibility of systemd messing with things.
I was surprised that cds were not always being recognized, along with other media.
However, I finally noted that, for my set-up anyway, a cd physically in place
in the cd drive reader during boot will be recognized, whereas a cd added after boot
will not be recognized.
So, one work-around for Knoppix 7.7.0 LiveUSB legacy boot users is simply just to
re-boot with the cd in place. I would not be surprised that this problem and work-
around might apply to earlier Knoppix LiveUSBs as well, but I haven't checked this out.
H261-Z61 2U 24SFF AMD Server 8x EPYC 7702 512-Cores 2048GB RAM 8x25G NIC 2x2200W
$13292.18
HPE ProLiant MicroServer Gen8 Intel Xeon E3-1265L 16GB ECC PCIe x16 4x1TB HDD
$249.99
SuperMicro Server 505-2 Intel Atom 2.4GHz 8GB RAM SYS-5018A-FTN4 1U Rackmount
$202.49
Supermicro 5018A-FTN4 Rack Server - Black
$125.00
Supermicro E300-8D Xeon D-1518 2.20GHz Mini Server
$574.99
Supermicro CSE 823-6 2U 6 Bay Chassis ,1xPWS 653-2H 650Wsold as in the photo,
$119.75
Supermicro Super Server Tower Xeon E5-2620 v4 2.10Ghz 64GB RAM NO HDD NO OS
$124.95
Supermicro SYS-E50-9AP-N5 Mini Fanless Server pfSense 5x 1GbE Atom E3940 8GB RAM
$180.00
Supermicro 1U X11DPU 2x Xeon Gold 6132 2.6GHz / 128gb / 10x 2.5 Trays / 2x 750w
$649.99
1U Supermicro Server 10 Bay 2x Intel Xeon 3.3Ghz 8C 128GB RAM 480GB SSD 2x 10GBE
$297.00