Comment # 6 on bug 1174939 from William Brown

The command succeeded after the config change, and it's doing something.

pyrite# snapper ls
...

dmesg: 
[21775.924812] BTRFS warning (device vda2): qgroup rescan is already in
progress

A little while later I finally see:

pyrite# snapper ls
   # | Type   | Pre # | Date                             | User | Used Space |
Cleanup | Description             | Userdata
-----+--------+-------+----------------------------------+------+------------+---------+-------------------------+--------------
  0  | single |       |                                  | root |            | 
       | current                 |
157  | single |       | Wed 12 Aug 2020 01:47:23 AM AEST | root |  48.63 MiB |
number  | Snapshot Update of #156 | important=yes
158  | single |       | Fri 14 Aug 2020 01:45:56 AM AEST | root |   2.37 MiB |
number  | Snapshot Update of #157 | important=yes
159  | single |       | Sat 15 Aug 2020 12:08:40 AM AEST | root |  14.37 MiB |
number  | Snapshot Update of #158 | important=yes
160  | single |       | Sun 16 Aug 2020 01:49:27 AM AEST | root |  17.46 MiB |
number  | Snapshot Update of #159 | important=yes
161  | single |       | Mon 17 Aug 2020 12:14:32 AM AEST | root |  16.03 MiB |
number  | Snapshot Update of #160 | important=yes
162  | single |       | Tue 18 Aug 2020 01:20:29 AM AEST | root |   9.85 MiB |
number  | Snapshot Update of #161 | important=yes
163  | single |       | Wed 19 Aug 2020 12:24:33 AM AEST | root |   6.18 MiB | 
       | Snapshot Update of #162 |
164* | single |       | Fri 21 Aug 2020 12:57:56 AM AEST | root |  57.59 MiB | 
       | Snapshot Update of #163 |

I'm curious how my system got into this broken state given it was a very recent
fresh install, and I haven't tweaked any of these low level parts, but I guess
now that evidence is lost to the sands of time ...