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bug#36725: 26.1; Emacs can't connect to gnu elpa


From: Tim Cross
Subject: bug#36725: 26.1; Emacs can't connect to gnu elpa
Date: Fri, 19 Jul 2019 23:18:25 +1000

Weird. When I set that variable, both elpa and melpa fail. 

I upgraded to the 26.2.90 pretest and now it all works fine - no need to set any additional variable. 

I also increased the gnutls-log-level to 1 and saw a resource temporarily unavailable errors. I'm running a dual stack network (IPv4 and IPv6) and wonder if perhaps elpa.gnu.org IPv4 was fine but IPv6 was not and my system was attempting to connect via IPv6. Thais could explain why I had more success on the macOS as that system has IPv6 set to link-local only. 

All speculation at this point. All working with the emacs pretest version, so now I can get back to what I was originally trying to do oh so many houts ago!

On Fri, 19 Jul 2019 at 23:06, Lennard Henze <address@hidden> wrote:

Cleaned everything:

emacs -Q: get into small buffer for lisp eval

try to set via set-variable: does not find gnutls-algorithm-priority (only var starting with gnutls is gnutls-min-prime-bits)

do customize-group gnutls: there the variable gnutls-algorithm-priority is shown and set to nil

change it to NORMAL:-VERS-TLS1.3

run package-initialize: no problem

run package-refresh-contents: no problem

install undo-tree via package-install ret undo-tree ret: no problem

 On 19.07.19 14:33, Tim Cross wrote:
What happens if you do 

emacs -Q

set the gnutls-algorithm-priority (using customize-group or set-variable)
 
and then

M-x customize-group gnutls

M-x package-initialise
M-x package-refresh-contents

I get a failed to download 'gnu' archive error. If I try to install the delight package (also a dependency of use-package) I get the bad response error.

The issue is definitely TLS related, but not sure if it is client or server end. When I set the perferred algorithm variable, the connections to MELPA fail as well. Without setting that variable (i.e. set to nil) the connections to MELPA work fine and only ELPA fails.

Tim



On Fri, 19 Jul 2019 at 22:15, Lennard Henze <address@hidden> wrote:

Hey, I just double checked to not cause unnecessary confusion:

Crated new user on arch to get empty home:

used same .emacs as before, but without (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3"). After refreshing package list i can find undo-tree in gnu repos. When i try to install get the same bad request bug.

After adding the line (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3")

use-package downloads the package properly at startup and everything works fine.

Can i provide additional debug info?
Still not sure tho if its some dumb mistake in my os.

On 19.07.19 14:09, Tim Cross wrote:
Yep, checked and it made no difference. Did get a little more wrt error info

gnutls.el: (err=[-50] The request is invalid.) boot: (:priority "NORMAL:-VERS-TLS1.3" :hostname melpa.org :loglevel 0 :min-prime-bits 256 :trustfiles (/etc/ssl/certs/ca-certificates.crt) :crlfiles nil :keylist nil :verify-flags nil :verify-error nil :callbacks nil)

Also tried with TLS 1.2, same error.



On Fri, 19 Jul 2019 at 22:02, Noam Postavsky <address@hidden> wrote:
Robert Pluim <address@hidden> writes:

>     Noam> Does (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3") help?  If
>     Noam> yes, this is likely Bug#34341 (should already be fixed already in
>     Noam> emacs-26, and the 26.2.90 pretest).
>
> elpa.gnu.org uses TLS1.2, not TLS1.3. But emacs-27 has a bunch of
> changes in its TLS handling that might improve matters.

Hmm, it does.  On the other hand, Lennard told me [Lennard, please use
"Reply All" next time so your response goes to the bug list] that (setq
gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3") did actually help.

Tim, can you check the gnutls-algorithm-priority workaround too?



--
regards,

Tim

--
Tim Cross



--
regards,

Tim

--
Tim Cross



--
regards,

Tim

--
Tim Cross


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