diff -Nru kitty-0.26.5/debian/changelog kitty-0.26.5/debian/changelog
--- kitty-0.26.5/debian/changelog	2023-01-30 20:32:11.000000000 +0100
+++ kitty-0.26.5/debian/changelog	2023-02-01 12:31:03.000000000 +0100
@@ -1,3 +1,9 @@
+kitty (0.26.5-3ubuntu2) lunar; urgency=medium
+
+  * disable crypto test if RLIMIT_MEMLOCK is too low (LP: #2004435)
+
+ -- Olivier Gayot <olivier.gayot@canonical.com>  Wed, 01 Feb 2023 12:31:03 +0100
+
 kitty (0.26.5-3ubuntu1) lunar; urgency=medium
 
   * Set empty TERM in test environment, required for build-time tests to
diff -Nru kitty-0.26.5/debian/patches/conditionally-skip-crypto-test.patch kitty-0.26.5/debian/patches/conditionally-skip-crypto-test.patch
--- kitty-0.26.5/debian/patches/conditionally-skip-crypto-test.patch	1970-01-01 01:00:00.000000000 +0100
+++ kitty-0.26.5/debian/patches/conditionally-skip-crypto-test.patch	2023-02-01 12:31:03.000000000 +0100
@@ -0,0 +1,38 @@
+Description: skip crypto test if RLIMIT_MEMLOCK is too low
+ When building on ppc64el in Ubuntu, RLIMIT_MEMLOCK is set to the same value as
+ the pagesize. This means only a single call to mlock() can succeed.
+ Since the crypto test makes multiple calls to mlock(), the test fails in the
+ described environment.
+ Make sure we skip the test if the RLIMIT_MEMLOCK is too low.
+Author: Olivier Gayot <olivier.gayot@canonical.com>
+Bug: https://github.com/kovidgoyal/kitty/issues/5466
+Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1030238
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/2004435
+Forwarded: https://github.com/kovidgoyal/kitty/issues/5466#issuecomment-1412004797
+Last-Update: 2023-02-01
+---
+This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
+Index: kitty-0.26.5/kitty_tests/crypto.py
+===================================================================
+--- kitty-0.26.5.orig/kitty_tests/crypto.py	2023-02-01 13:17:33.662880021 +0100
++++ kitty-0.26.5/kitty_tests/crypto.py	2023-02-01 13:25:53.667978172 +0100
+@@ -3,12 +3,19 @@
+ 
+ 
+ import os
++import resource
++import unittest
+ 
+ from . import BaseTest
+ 
+ 
++memlock_limit, _ = resource.getrlimit(resource.RLIMIT_MEMLOCK)
++pagesize = resource.getpagesize()
++
++
+ class TestCrypto(BaseTest):
+ 
++    @unittest.skipIf(memlock_limit <= pagesize, "RLIMIT_MEMLOCK is too low")
+     def test_elliptic_curve_data_exchange(self):
+         from kitty.fast_data_types import (
+             AES256GCMDecrypt, AES256GCMEncrypt, CryptoError, EllipticCurveKey
diff -Nru kitty-0.26.5/debian/patches/series kitty-0.26.5/debian/patches/series
--- kitty-0.26.5/debian/patches/series	2023-01-04 12:14:15.000000000 +0100
+++ kitty-0.26.5/debian/patches/series	2023-02-01 12:31:03.000000000 +0100
@@ -1,3 +1,4 @@
 bash-integration-fix-clone-in-kitty-not-.patch
 define-singlekey-bitfields-according-to-.patch
 try-to-fix-tests-failing-on-python-3.11.patch
+conditionally-skip-crypto-test.patch