Unable to agree on a pubkey algorithm

[florentinanicolau]

I am using ubuntu 23.04 and a remarkable 2 version 3.24.0.149. Using pip3 install . gave me an error This environment is externally managed and I read on internet that I should instead use pipx install ..

The installation worked. rmview executable was installed here home/florentina/.local/pipx/venvs/rmview/bin/rmview.

However, when I run it, I get the following Unable to agree on a pubkey algorithm.

[INFO] Using system default known hosts file
[INFO] Loading system default known hosts file, this may take a while...
[INFO] System default known host file loaded
[INFO] Connecting...
[ERROR] Exception (client): Unable to agree on a pubkey algorithm for signing a 'ssh-rsa' key!
[ERROR] Traceback (most recent call last):
[ERROR]   File "/home/florentina/.local/pipx/venvs/rmview/lib/python3.11/site-packages/paramiko/transport.py", line 2256, in run
[ERROR]     handler(m)
[ERROR]   File "/home/florentina/.local/pipx/venvs/rmview/lib/python3.11/site-packages/paramiko/auth_handler.py", line 395, in _parse_service_accept
[ERROR]     algorithm = self._finalize_pubkey_algorithm(key_type)
[ERROR]                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ERROR]   File "/home/florentina/.local/pipx/venvs/rmview/lib/python3.11/site-packages/paramiko/auth_handler.py", line 368, in _finalize_pubkey_algorithm
[ERROR]     raise AuthenticationException(err.format(key_type))
[ERROR] paramiko.ssh_exception.AuthenticationException: Unable to agree on a pubkey algorithm for signing a 'ssh-rsa' key!
[ERROR] 
[ERROR] Could not connect to 10.11.99.1: No existing session
[INFO] Please check your remarkable is connected and retry.
[ERROR] No existing session
[INFO] QUITTING: Tue Jan 20 09:54:18 2026

Do you have any idea how I could make this work?

[wmkoolen]

This did it for me:
`diff --git a/src/rmview/connection.py b/src/rmview/connection.py
index 31b1a5b..a3286af 100644
--- a/src/rmview/connection.py
+++ b/src/rmview/connection.py
@@ -143,7 +143,7 @@ class rMConnect(QRunnable):
# remarkable's Dropbear version (Dropbear v2019.78) does not support the server-sig-algs extension,
# and also does not support sha2, so connection fails if sha2 is used
# paramiko starting with version 2.9.0, paramiko defaults to sha2 if not explicitly disabled: paramiko/paramiko#1961

•    'disabled_algorithms': {'pubkeys': ['rsa-sha2-512', 'rsa-sha2-256']},
  

•    #'disabled_algorithms': {'pubkeys': ['rsa-sha2-512', 'rsa-sha2-256']},
   }
  
   if self.auth_method == 'password':
  

`

[florentinanicolau]

Thanks for the reply!

Do I just need to comment the line:

 'disabled_algorithms': {'pubkeys': ['rsa-sha2-512', 'rsa-sha2-256']},

or is there more modifications to do? (I have a doubt since the code balise in your message does not seem to work as expected ^^').

EDIT: I was able to get a window with part of my screen displayed. The image is a little distorted. I can see the full height of the screen but only half the width. Ok I'll investigate that later.

[ajdunlap]

@florentinanicolau see #177 for the issue with only half the width coming through.