diff -up hplip-3.20.3/base/tui.py.keyserver hplip-3.20.3/base/tui.py

--- hplip-3.20.3/base/tui.py.keyserver	2020-03-10 09:01:53.000000000 +0100

+++ hplip-3.20.3/base/tui.py	2020-04-07 08:44:44.319710001 +0200

@@ -241,6 +241,7 @@ class ProgressMeter(object):

         sys.stdout.write(y)

         sys.stdout.flush()

+        sys.stdout.write('\n')

         self.prev_length = len(y)

         self.spinner_pos = (self.spinner_pos + 1) % 8

diff -up hplip-3.20.3/base/validation.py.keyserver hplip-3.20.3/base/validation.py

--- hplip-3.20.3/base/validation.py.keyserver	2020-03-10 09:01:53.000000000 +0100

+++ hplip-3.20.3/base/validation.py	2020-04-07 08:45:46.657132415 +0200

@@ -1,4 +1,4 @@

-#!/usr/bin/env python

+#!/usr/bin/python3

 # -*- coding: utf-8 -*-

 #

 # (c) Copyright 2015 HP Development Company, L.P.

@@ -42,8 +42,11 @@ class DigiSign_Verification(object):

 class GPG_Verification(DigiSign_Verification):

-    def __init__(self, pgp_site = 'pgp.mit.edu', key = 0x4ABA2F66DBD5A95894910E0673D770CDA59047B9):

-        self.__pgp_site = pgp_site

+    def __init__(self, keyservers = ['pool.sks-keyservers.net',

+                                     'keyserver.ubuntu.com',

+                                     'sks-keyservers.net', 'pgp.mit.edu'],

+                 key = 0x4ABA2F66DBD5A95894910E0673D770CDA59047B9):

+        self.__keyservers = keyservers

         self.__key = key

         self.__gpg = utils.which('gpg',True)

@@ -82,13 +85,18 @@ class GPG_Verification(DigiSign_Verifica

     def __acquire_gpg_key(self):

-

-        cmd = '%s --homedir %s --no-permission-warning --keyserver %s --recv-keys 0x%X' \

-              % (self.__gpg, self.__gpg_dir, self.__pgp_site, self.__key)

-

-        log.info("Receiving digital keys: %s" % cmd)

-        status, output = utils.run(cmd)

-        log.debug(output)

+        for kserver in self.__keyservers:

+            cmd = '%s --homedir %s --no-permission-warning --keyserver %s --recv-keys 0x%X' \

+                  % (self.__gpg, self.__gpg_dir, kserver, self.__key)

+

+            log.info("Receiving digital keys: %s" % cmd)

+            status, output = utils.run(cmd)

+            log.debug(output)

+

+            if not status:

+                break

+            log.info("Receiving keys from {} failed, trying the next keyserver."

+                     .format(kserver))

         self.__change_owner(True)