diff --git a/mx-linux/mx-21.sh b/mx-linux/mx-21.sh
index 894ac07..cf5af34 100644
--- a/mx-linux/mx-21.sh
+++ b/mx-linux/mx-21.sh
@@ -3,8 +3,6 @@
 # run as:  sudo mx-21.sh -y
 apt-get install gnupg software-properties-common
 apt-get update $1
-# mkusb - install failed in mx21
-#echo 'deb http://ppa.launchpad.net/mkusb/ppa/ubuntu focal main' | sudo tee /etc/apt/sources.list.d/mkusb.list
 apt-key adv --keyserver keyserver.ubuntu.com --recv 54B8C8AC
 echo 'deb http://deb.debian.org/debian experimental main' | sudo tee /etc/apt/sources.list.d/experimental.list
 echo 'deb http://ppa.launchpad.net/stefansundin/truecrypt/ubuntu focal main' | sudo tee /etc/apt/sources.list.d/truecrypt.list
@@ -15,7 +13,7 @@ echo 'deb http://ppa.launchpad.net/sebastian-stenzel/cryptomator/ubuntu focal ma
 apt-key adv --keyserver keyserver.ubuntu.com --recv-keys CD045438B0D383A4039EA86F892C15CD130FEB9A
 #echo 'deb http://ppa.launchpad.net/inkscape.dev/stable/ubuntu xenial main' | sudo tee /etc/apt/sources.list.d/inkscape.list
 #apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 22C4850146603F3DB0ED00479DA4BD18B9A06DE3
-echo 'deb http://ftp.debian.org/debian bullseye-backports non-free contrib main' | sudo tee /etc/apt/sources.list.d/debian.list
+# echo 'deb http://ftp.debian.org/debian bullseye-backports non-free contrib main' | sudo tee /etc/apt/sources.list.d/debian.list
 curl -s https://brave-browser-apt-release.s3.brave.com/brave-core.asc |  apt-key --keyring /etc/apt/trusted.gpg.d/brave-browser-release.gpg add -
 source /etc/os-release
 echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ buster main" | tee /etc/apt/sources.list.d/brave-browser-release-buster.list
@@ -30,18 +28,15 @@ wget -qO - https://qgis.org/downloads/qgis-2021.gpg.key |  gpg --no-default-keyr
 chmod a+r /etc/apt/trusted.gpg.d/qgis-archive.gpg
 add-apt-repository "deb https://qgis.org/ubuntu $(lsb_release -c -s) main"
 #--> QGiS
-echo 'deb http://download.opensuse.org/repositories/home:/erigas:/cpupower-gui/Debian_Testing/ /' | sudo tee /etc/apt/sources.list.d/home:erigas:cpupower-gui.list
-curl -fsSL https://download.opensuse.org/repositories/home:erigas:cpupower-gui/Debian_Testing/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_erigas_cpupower-gui.gpg > /dev/null
 echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg] https://updates.signal.org/desktop/apt xenial main' |\
   sudo tee -a /etc/apt/sources.list.d/signal-xenial.list
 apt-get update $1
 apt-get upgrade $1
-# mkusb from ppa
-# apt-get install $1 mkusb
 # python 3.9.2 already installed in MX21
-#<-- cpupower from ppa
-apt-get install $1 cpupower-gui
-apt-get install $1 gir1.2-handy-1
+#<-- cpupower  install from main repo
+# apt-get install $1 cpupower-gui
+# install test repo:
+# apt-get install $1 gir1.2-handy-1
 #--> cpupower
 apt-get install $1 net-tools
 # telegram from ppa