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.
LOT OF 20 Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module
$89.00
New Cisco w/ Green Hologram SFP-25G-SR-S 25G SFP28 SR 850nm 300m LC MMF Module
$69.99
10 PCS Cisco GLC-LH-SMD 10-2625-01 1310nm SFP Transceiver Module
$85.00
New Cisco w/ Green Hologram SFP-10G-LR-S 10G SFP+ LR 1310nm 10km SMF LC Module
$34.99
Genuine Cisco SFP-10G-SR V03 10GBASE-SR SFP+ Transceiver Module 10-2415-03
$8.00
SFP-10G-SR Original Cisco 10GBASE-SR SFP+ V02 Multi mode Transceiver 10-2415-02
$5.00
NEW FS SFP-10G-T 10GBASE T SFP+ 30M Transceiver Module (Lot of 1)
$39.95
Arista 10G SFP-10G-SR 10GB 850nm SFP+ Transceiver XVR-00001-02 600pcs LikeNEW
$10.50
Brand New Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Module 1310nm 10km SMF LC
$10.99
Genuine Dell Broadcom 57840S 10GbE Quad Port SFP+ Network Adapter JC10M XGRFF
$39.59