diff --git a/extra/cups/0002_do_not_set_RGB_default_on_monochrome_printers.patch b/extra/cups/0002_do_not_set_RGB_default_on_monochrome_printers.patch
new file mode 100644
index 000000000..2b10c1f81
--- /dev/null
+++ b/extra/cups/0002_do_not_set_RGB_default_on_monochrome_printers.patch
@@ -0,0 +1,33 @@
+From ebf3bb82593e5f49093ed7b9e52452333240d225 Mon Sep 17 00:00:00 2001
+From: Till Kamppeter <till.kamppeter@gmail.com>
+Date: Wed, 15 Feb 2023 22:01:05 +0100
+Subject: [PATCH] In auto-generated PPDs do not set RGB default on mono
+ printers
+
+When a PPD for a driverless printer is generated by the
+_ppdCreateFromIPP2() function and the get-printer-attributes IPP
+response gives "print-color-mode-default=auto" the PPD's default
+setting for "ColorModel" is always "RGB", even on monochrome printers,
+which makes printing fail on most devices.
+
+Now we ignore the "print-color-mode-default" if set to "auto" and
+proceed as if no default was given, finding the default by selecting
+the most desirable of the existing "ColorModel" choices.
+---
+ cups/ppd-cache.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/cups/ppd-cache.c b/cups/ppd-cache.c
+index 3c53f510d..2489ee313 100644
+--- a/cups/ppd-cache.c
++++ b/cups/ppd-cache.c
+@@ -4129,7 +4129,8 @@ _ppdCreateFromIPP2(
+     int wrote_color = 0;
+     const char *default_color = NULL;	/* Default */
+ 
+-    if ((keyword = ippGetString(defattr, 0, NULL)) != NULL)
++    if ((keyword = ippGetString(defattr, 0, NULL)) != NULL &&
++	strcmp(keyword, "auto"))
+     {
+       if (!strcmp(keyword, "bi-level"))
+         default_color = "FastGray";
diff --git a/extra/cups/PKGBUILD b/extra/cups/PKGBUILD
index a8faaecc0..50b23f394 100644
--- a/extra/cups/PKGBUILD
+++ b/extra/cups/PKGBUILD
@@ -6,7 +6,7 @@
 pkgbase="cups"
 pkgname=('libcups' 'cups')
 pkgver=2.4.2
-pkgrel=6
+pkgrel=7
 epoch=1
 arch=('x86_64')
 options=(!distcc)
@@ -24,6 +24,7 @@ source=(https://github.com/OpenPrinting/cups/releases/download/v${pkgver}/cups-$
         cups-freebind.patch
         guid.patch
         0001_Fix_OpenSSL_crash_bug.patch
+        0002_do_not_set_RGB_default_on_monochrome_printers.patch
 )
 sha256sums=('f03ccb40b087d1e30940a40e0141dcbba263f39974c20eb9f2521066c9c6c908'
             'SKIP'
@@ -33,7 +34,8 @@ sha256sums=('f03ccb40b087d1e30940a40e0141dcbba263f39974c20eb9f2521066c9c6c908'
             'f0b15192952c151b1843742c87850ff3a7d0f3ba5dd236ed16623ef908472ad7'
             '3385047b9ac8a7b13aeb8f0ca55d15f793ce7283516db0155fe28a67923c592d'
             '0bf6a75ba1b051771f155d9a5d36b307a6d40c6857d645b250fe93f3fb713474'
-            '632faf08bfd1863e9ad6807aff766983e84030a0e4df441167f17de7266ca152')
+            '632faf08bfd1863e9ad6807aff766983e84030a0e4df441167f17de7266ca152'
+            'f7e2c6dfcdf882f0f54c95728a3e2c63309ee73f9d2efc8e5b8a758fb2c7f429')
 #validpgpkeys=('3737FD0D0E63B30172440D2DDBA3A7AB08D76223') # CUPS.org (CUPS.org PGP key) <security@cups.org>
 #validpgpkeys+=('45D083946E3035282B3CCA9AF434104235DA97EB') # "CUPS.org <security@cups.org>"
 #validpgpkeys+=('845464660B686AAB36540B6F999559A027815955') # "Michael R Sweet <michael.r.sweet@gmail.com>"
@@ -60,6 +62,10 @@ prepare() {
   # Fix OpenSSL crash bug - "tls" pointer wasn't cleared after
   patch -Np1 -i "${srcdir}"/0001_Fix_OpenSSL_crash_bug.patch
 
+  # In auto-generated PPDs do not set RGB default on mono printers - FS#78150
+  # https://github.com/OpenPrinting/cups/commit/ebf3bb82593e5f49093ed7b9e52452333240d225
+  patch -Np1 -i "${srcdir}"/0002_do_not_set_RGB_default_on_monochrome_printers.patch
+
   # Rebuild configure script
   aclocal -I config-scripts
   autoconf -I config-scripts
diff --git a/extra/cups/keys/pgp/7082A0A50A2E92640F3880E0E4522DCC9B246FF7.asc b/extra/cups/keys/pgp/7082A0A50A2E92640F3880E0E4522DCC9B246FF7.asc
new file mode 100644
index 000000000..388b6a790
--- /dev/null
+++ b/extra/cups/keys/pgp/7082A0A50A2E92640F3880E0E4522DCC9B246FF7.asc
@@ -0,0 +1,14 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+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+=vSEm
+-----END PGP PUBLIC KEY BLOCK-----