I am trying to install Desktop Dimmer v4.0.4 (amd64) on my Ubuntu 20.04 using the DEB package. The app shows up in the Applications menu but does not open. Upon trying to run it as a command-line utility I get the following error:
user@thehost:~$ desktop-dimmer Gtk-Message: 18:23:15.355: Failed to load module "canberra-gtk-module" (desktop-dimmer:2454): Pango-ERROR **: 18:23:15.610: Harfbuzz version too old (1.2.7) Trace/breakpoint trap (core dumped) How do I update Harfbuzz on my Ubuntu?
Update #1:
user@thehost:~/Downloads$ ldd $(which desktop-dimmer) linux-vdso.so.1 (0x00007fff3ede6000) libnode.so => not found libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f3688ebe000) libgtk-x11-2.0.so.0 => /lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 (0x00007f3688a64000) libgdk-x11-2.0.so.0 => /lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 (0x00007f36889a9000) libatk-1.0.so.0 => /lib/x86_64-linux-gnu/libatk-1.0.so.0 (0x00007f368897f000) libgio-2.0.so.0 => /lib/x86_64-linux-gnu/libgio-2.0.so.0 (0x00007f368879e000) libpangocairo-1.0.so.0 => /lib/x86_64-linux-gnu/libpangocairo-1.0.so.0 (0x00007f368878a000) libgdk_pixbuf-2.0.so.0 => /lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0 (0x00007f3688762000) libcairo.so.2 => /lib/x86_64-linux-gnu/libcairo.so.2 (0x00007f368863f000) libpango-1.0.so.0 => /lib/x86_64-linux-gnu/libpango-1.0.so.0 (0x00007f36885f0000) libfreetype.so.6 => /lib/x86_64-linux-gnu/libfreetype.so.6 (0x00007f3688531000) libfontconfig.so.1 => /lib/x86_64-linux-gnu/libfontconfig.so.1 (0x00007f36884ea000) libgobject-2.0.so.0 => /lib/x86_64-linux-gnu/libgobject-2.0.so.0 (0x00007f3688488000) libdbus-1.so.3 => /lib/x86_64-linux-gnu/libdbus-1.so.3 (0x00007f3688437000) libXi.so.6 => /lib/x86_64-linux-gnu/libXi.so.6 (0x00007f3688425000) libXcursor.so.1 => /lib/x86_64-linux-gnu/libXcursor.so.1 (0x00007f3688418000) libXdamage.so.1 => /lib/x86_64-linux-gnu/libXdamage.so.1 (0x00007f3688413000) libXrandr.so.2 => /lib/x86_64-linux-gnu/libXrandr.so.2 (0x00007f3688406000) libXcomposite.so.1 => /lib/x86_64-linux-gnu/libXcomposite.so.1 (0x00007f36883ff000) libXext.so.6 => /lib/x86_64-linux-gnu/libXext.so.6 (0x00007f36883ea000) libXfixes.so.3 => /lib/x86_64-linux-gnu/libXfixes.so.3 (0x00007f36883e2000) libXrender.so.1 => /lib/x86_64-linux-gnu/libXrender.so.1 (0x00007f36881d8000) libX11.so.6 => /lib/x86_64-linux-gnu/libX11.so.6 (0x00007f368809b000) libXtst.so.6 => /lib/x86_64-linux-gnu/libXtst.so.6 (0x00007f3687e95000) libXss.so.1 => /lib/x86_64-linux-gnu/libXss.so.1 (0x00007f3687e8e000) libgconf-2.so.4 => /lib/x86_64-linux-gnu/libgconf-2.so.4 (0x00007f3687e5b000) libgmodule-2.0.so.0 => /lib/x86_64-linux-gnu/libgmodule-2.0.so.0 (0x00007f3687e55000) librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f3687e4a000) libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f3687d21000) libnss3.so => /lib/x86_64-linux-gnu/libnss3.so (0x00007f3687bd2000) libnssutil3.so => /lib/x86_64-linux-gnu/libnssutil3.so (0x00007f3687b9d000) libsmime3.so => /lib/x86_64-linux-gnu/libsmime3.so (0x00007f3687b6d000) libnspr4.so => /lib/x86_64-linux-gnu/libnspr4.so (0x00007f3687b2d000) libffmpeg.so => not found libasound.so.2 => /lib/x86_64-linux-gnu/libasound.so.2 (0x00007f3687a36000) libcups.so.2 => /lib/x86_64-linux-gnu/libcups.so.2 (0x00007f368799b000) libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f3687993000) libexpat.so.1 => /lib/x86_64-linux-gnu/libexpat.so.1 (0x00007f3687965000) libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f3687784000) libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f3687635000) libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f368761a000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f3687428000) /lib64/ld-linux-x86-64.so.2 (0x00007f3688ef7000) libpangoft2-1.0.so.0 => /lib/x86_64-linux-gnu/libpangoft2-1.0.so.0 (0x00007f368740d000) libXinerama.so.1 => /lib/x86_64-linux-gnu/libXinerama.so.1 (0x00007f3687408000) libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f36873ec000) libmount.so.1 => /lib/x86_64-linux-gnu/libmount.so.1 (0x00007f368738c000) libselinux.so.1 => /lib/x86_64-linux-gnu/libselinux.so.1 (0x00007f3687361000) libresolv.so.2 => /lib/x86_64-linux-gnu/libresolv.so.2 (0x00007f3687343000) libpixman-1.so.0 => /lib/x86_64-linux-gnu/libpixman-1.so.0 (0x00007f368729c000) libpng16.so.16 => /lib/x86_64-linux-gnu/libpng16.so.16 (0x00007f3687264000) libxcb-shm.so.0 => /lib/x86_64-linux-gnu/libxcb-shm.so.0 (0x00007f368725f000) libxcb.so.1 => /lib/x86_64-linux-gnu/libxcb.so.1 (0x00007f3687235000) libxcb-render.so.0 => /lib/x86_64-linux-gnu/libxcb-render.so.0 (0x00007f3687224000) libfribidi.so.0 => /lib/x86_64-linux-gnu/libfribidi.so.0 (0x00007f3687207000) libthai.so.0 => /lib/x86_64-linux-gnu/libthai.so.0 (0x00007f36871fc000) libharfbuzz.so.0 => /lib/x86_64-linux-gnu/libharfbuzz.so.0 (0x00007f36870f7000) libuuid.so.1 => /lib/x86_64-linux-gnu/libuuid.so.1 (0x00007f36870ee000) libffi.so.7 => /lib/x86_64-linux-gnu/libffi.so.7 (0x00007f36870e0000) libsystemd.so.0 => /lib/x86_64-linux-gnu/libsystemd.so.0 (0x00007f3687033000) libdbus-glib-1.so.2 => /lib/x86_64-linux-gnu/libdbus-glib-1.so.2 (0x00007f3687008000) libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f3686f95000) libplc4.so => /lib/x86_64-linux-gnu/libplc4.so (0x00007f3686f8e000) libplds4.so => /lib/x86_64-linux-gnu/libplds4.so (0x00007f3686f87000) libgssapi_krb5.so.2 => /lib/x86_64-linux-gnu/libgssapi_krb5.so.2 (0x00007f3686f3a000) libavahi-common.so.3 => /lib/x86_64-linux-gnu/libavahi-common.so.3 (0x00007f3686f2c000) libavahi-client.so.3 => /lib/x86_64-linux-gnu/libavahi-client.so.3 (0x00007f3686f19000) libgnutls.so.30 => /lib/x86_64-linux-gnu/libgnutls.so.30 (0x00007f3686d43000) libblkid.so.1 => /lib/x86_64-linux-gnu/libblkid.so.1 (0x00007f3686cea000) libpcre2-8.so.0 => /lib/x86_64-linux-gnu/libpcre2-8.so.0 (0x00007f3686c5a000) libXau.so.6 => /lib/x86_64-linux-gnu/libXau.so.6 (0x00007f3686c54000) libXdmcp.so.6 => /lib/x86_64-linux-gnu/libXdmcp.so.6 (0x00007f3686c4c000) libdatrie.so.1 => /lib/x86_64-linux-gnu/libdatrie.so.1 (0x00007f3686c42000) libgraphite2.so.3 => /lib/x86_64-linux-gnu/libgraphite2.so.3 (0x00007f3686c13000) liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f3686bec000) liblz4.so.1 => /lib/x86_64-linux-gnu/liblz4.so.1 (0x00007f3686bcb000) libgcrypt.so.20 => /lib/x86_64-linux-gnu/libgcrypt.so.20 (0x00007f3686aad000) libkrb5.so.3 => /lib/x86_64-linux-gnu/libkrb5.so.3 (0x00007f36869d0000) libk5crypto.so.3 => /lib/x86_64-linux-gnu/libk5crypto.so.3 (0x00007f368699d000) libcom_err.so.2 => /lib/x86_64-linux-gnu/libcom_err.so.2 (0x00007f3686996000) libkrb5support.so.0 => /lib/x86_64-linux-gnu/libkrb5support.so.0 (0x00007f3686987000) libp11-kit.so.0 => /lib/x86_64-linux-gnu/libp11-kit.so.0 (0x00007f3686851000) libidn2.so.0 => /lib/x86_64-linux-gnu/libidn2.so.0 (0x00007f3686830000) libunistring.so.2 => /lib/x86_64-linux-gnu/libunistring.so.2 (0x00007f36866ae000) libtasn1.so.6 => /lib/x86_64-linux-gnu/libtasn1.so.6 (0x00007f3686696000) libnettle.so.7 => /lib/x86_64-linux-gnu/libnettle.so.7 (0x00007f368665c000) libhogweed.so.5 => /lib/x86_64-linux-gnu/libhogweed.so.5 (0x00007f3686624000) libgmp.so.10 => /lib/x86_64-linux-gnu/libgmp.so.10 (0x00007f36865a0000) libbsd.so.0 => /lib/x86_64-linux-gnu/libbsd.so.0 (0x00007f3686586000) libgpg-error.so.0 => /lib/x86_64-linux-gnu/libgpg-error.so.0 (0x00007f3686561000) libkeyutils.so.1 => /lib/x86_64-linux-gnu/libkeyutils.so.1 (0x00007f368655a000) Update #2
user@thehost:~/Downloads$ apt policy libharfbuzz0b libharfbuzz0b: Installed: 2.6.4-1ubuntu4 Candidate: 2.6.4-1ubuntu4 Version table: *** 2.6.4-1ubuntu4 500 500 http://in.archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status 
lscpusaysArchitecture: x86_64so I know I am getting the right DEB package :)