Since the MythTV box was updated to 18.04, and kernel 5.x installed, I had not touched the optical drive. It has been a couple of years. Our standalone DVD player gave up the ghost yesterday (LG BD630, 11 years old) and I thought, well, just play the disk in MythTV. But it is looking for /dev/dvd and there is no such thing. There is no /dev/sr0 either, in kernel 5.4.0-97-generic, the driver isn't even present. The device doesn't show up in "lsscsci" but dmesg has these lines from boot:
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[ 17.840104] ata6.00: ATAPI: TSSTcorp CDDVDW SH-S203N, SB01, max UDMA/100
[ 18.110826] ata6.00: failed to IDENTIFY (I/O error, err_mask=0x100)
[ 18.129479] ata6.00: revalidation failed (errno=-5)
[ 18.143803] ata6.00: disabled
[ 18.632421] ata6: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
Any suggestions for how to make that optical disk reader show up in the system? Note that putting a DVD in it doesn't seem to trigger anything, no messages in dmesg or syslog.
It is possible that the optical drive is caput too, as I think it dates from 2007 or so.
Thanks.