Comment 14 for bug 1929444

Sorry for the delay - the notification mail seems to have gone missing. Good job I decided to look anyway.

The result is that final WORKS:

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root@gmllaptop:~# uname -a
Linux gmllaptop 5.11.0-19-generic #20 SMP Wed Jun 2 11:33:21 CST 2021 x86_64 x86_64 x86_64 GNU/Linux
root@gmllaptop:~# dmesg | tail -4
[ 114.286474] mmc0: cannot verify signal voltage switch
[ 114.410823] mmc0: new ultra high speed SDR50 SDHC card at address e624
[ 114.427153] mmcblk0: mmc0:e624 SD16G 14.8 GiB
[ 114.438100] mmcblk0: p1