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Metered connections are network connections that charge by volume of data transferred. That happens, for instance, with 4G modems, which I am using this week.
When one tethers a 4G mobile phone to a laptop, it is possible to select that the connection is metered, to avoid that Windows uses that link to download big but not so important data (e.g. updates).
I was unaware that OneDrive deactivates itself in metered connections even if I ask to synchronize data. When I opened a big file (the ones that OneDrive typically removes from the computer to save space and leaves in the cloud) Emacs got a system error that led to the behavior described before. It also happens with smaller files, I now realize, provided they were not cached in the computer.
It is possible to disable the "metered connection" status from the wifi network properties (Windows 10 and Windows 11 settings interface, not control panel). Then OneDrive spins up again and Emacs is left waiting until the file is downloaded, with no error message.
Juanjo
Eli Zaretskii <eliz@gnu.org> escribió:
Date: Wed, 13 Jul 2022 10:22:09 +0200
From: Juan Jose Garcia Ripoll <juanjose.garcia.ripoll@csic.es>
Cc: larsi@gnus.org, 56499@debbugs.gnu.org
Apologies for the noise. I have found out that this problem is related to "metered connections".
Thanks. I was about to tell that I couldn't reproduce the problem on
a machine where I have OneDrive set up.
On those
ones, Emacs cannot trigger opening of the file and is not capable of returning the right error message. Once
I disable the option "metered connection" from the network, Emacs operates as expected. I suspect this
cannot really be attributed to Emacs, except for the lack of error message in the first situation.
Would you mind please telling more about the situation where it
happens and about the symptoms? Does this happen only with
find-file-literally? does it happen only with large files? and what
exactly are "metered connections" and how does one disable that
option?
The reason for the questions is that I'd like to describe the problem
and the solution in etc/PROBLEMS.
Thanks.
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