Good catch. Thank you.

Hi,
I corrected all the accents. I created a PR here https://github.com/gpg/gpg4win/pull/3

Any ideas? Is there any other info needed that could help move this along?

There is a conflict between the systemd based launching of gpg-agent and gpg's own launching of the agent. Further systemd seems to remove the /run/user/UID directory which unlinks gpg-agent's socket. gpg-agent's self-check notices this after a minute and termintates itself.

I think that rG61aea64b3c17: scd: Fix the use case of verify_chv2 by CHECKPIN. fixes this issue.

I observed that the card reader's going erroneous state when I removed a card during its communication.
In this state, it never reports the card removal by the interrupt transfer.
I applied rG920f258eb601: scd: Internal CCID driver: More fix for SPR532. for this problem.

Great, thank you @gniibe.

Thanks for your report.

Update found out the answer for this mystery but I need to know why from you guys:

With all respect. Should I wait for a follow-up or I should consider this case as closed?

With 2.3 we add the keyboxd which uses sqlite (and thus indices) as database. This makes lookups much much faster and avoids problems with several processes accessing the pubring.kbx. If you want to try this you can do so with 2.3:

The patch rG684a52dffa8b: scd: Change handling of SPR532 card reader. makes me happier. It is more stable.

This is also what I found out with my tests with the libvirt usb: removing and redirecting back the device got it working again.

Testing more, I managed to encounter failure with physical usb.
Once in this failure mode, I need to remove the card reader from USB and reinsert again.
I need to figure out a sequence to avoid this situation and to reset the card reader correctly.

I tested with physical usb, did multiple operations with external events (insert/remove/etc. for card). I haven't seen any problem (if so, I were doing more fixes), so far.

That code in gnupg has not been touched in a very long time so this may be caused by some side effect.

Ok. Tried to test this with master, but failed. I got it compiled and installed, and it actually detected the first removal after reboot/suspend/reader attach/whatever reason, but after that when I inserted the card back, it didn't function anymore. I suppose you also tried that? I mean that's the use case, I suppose: to be able to remove/insert the card reliably all day long.

I am sorry, but I do not understand your request. Please give real commands as examples.
You known that you can always use --output FILENAME to force a certain file name?

Currently, yes. After some testing, I'll backport it to 2.2.

Nice, thanks! If I want to try this fix, should I just compile the master tree?

I am sorry, but this is a bug tracker and not a help list. I don't even known what Electrum is. Please ask at their support site or if you are looking for general help with GnuPG post to the gnupg-users mailing list (see https://gnupg.org/documentation/mailing-lists.html)

I also don't want to leave my card in the reader authenticated for a full day, it just doesn't sound like a good practice to me. I also very often just forget about the card, so it just sits there, keys open for use.

Update: Using --use-standard-socket argument to run this does not work and gpg-agent still create new process. New findings:

Thank you very much for your answer.
Unfortunately, I can't use --quick-add-key, because I believe the command generates a new subkey. What I'm trying to do is adding an already existing key as the subkey of a master key.

Please do not use addkey with in such a way. The use of "canned"commands way work now for you but can lead to unexpected results if anything changes, either due to changes in another gpg version or due to changes in your key etc.. The correct use requires a state machines along with --stattus-fd and command-fd. Because that is quite hairy to get right we have added a set of quick commands. In your case your should use

Just to acknowledge here: I notice that the new gpg-agent random process respawn with an obsolete argument using --use-standard-socket. I will run my gpg daemon using this absolete argument to see if it can block this random process. [updated the script]

Thanks for your reply. I can confirm from my observation from the log this is a bug where I'm able to reproduce this every day. I will post this to mailing lists.

I tried using the portable version it wasnt portable apps, i used it the zip file option from this site, https://portapps.io/app/gnupg-portable/