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.
Dell Optiplex 5060 SFF 8th Gen Core i7 3.2GHZ 16GB 512GB Win 11 Pro
$249.00
Lenovo IdeaCentre 3 07IRB8 Desktop Intel Core i5-13400 16GB 512GB SSD W11H
$429.99
Intel - Core i9-13900K 13th Gen 24 cores 8 P-cores + 16 E-cores 36M Cache, 3 ...
$689.99
Intel - Core i7-13700K 13th Gen 16 cores 8 P-cores + 8 E-cores 30M Cache, 3.4...
$489.99
AMD Ryzen 7 7800X3D 8-Core - 16-Thread 4.2 GHz (5.0 GHz Max Boost) Socket A...
$339.95
Apple Mac Pro Processor Tray 5,1 2010 2012 2.4ghz 8 core
$79.99
Intel Core i5-6500T SR2L8 2.50GHz Desktop Processor Socket 1151 Quad Core CPU
$22.99
Intel - Core i9-12900K Desktop Processor 16 (8P+8E) Cores up to 5.2 GHz Unloc...
$619.99
Dell optiplex 7050 Intel core I7-7700 3.6 GHz 8 GB ram No HDD/No OS
$89.99
Dell 9020 Optiplex Micro-Intel Core i5 - 1TB SSD 8GB RAM Window 11
$129.49