I can no longer use my second monitor; upgrade fails consistently

Try:

unset http_proxy https_proxy HTTP_PROXY HTTPS_PROXY
sudo apt clean
sudo apt update
sudo apt upgrade

That’s the local address of my ISP’s Internet gateway (AT&T fiber). I have a router behind that, with my LAN on a 172.x.x.x network.

Result:

$ sudo apt update
Hit:1 https://repo.radeon.com/amdgpu/6.4.2/ubuntu noble InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu noble InRelease                                        
Hit:3 http://us.archive.ubuntu.com/ubuntu noble-updates InRelease                                                         
Hit:4 https://repo.radeon.com/rocm/apt/6.4.2 noble InRelease                                                           
Hit:5 http://us.archive.ubuntu.com/ubuntu noble-backports InRelease                       
Hit:6 http://security.ubuntu.com/ubuntu noble-security InRelease    
Ign:7 https://apt.enpass.io stable InRelease  
Hit:8 https://apt.enpass.io stable Release
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.

$ sudo apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
Get more security updates through Ubuntu Pro with 'esm-apps' enabled:
  libqt5webengine-data vlc-plugin-qt libvlc5 libimage-magick-perl
  libdcmtk17t64 libmagickcore-6.q16-7t64 python3-flask-cors libzvbi-common
  liburiparser1 vlc-data libqt5quickwidgets5 libopenimageio2.4t64
  libqt5xml5t64 qml-module-qtquick-shapes qml-module-qtquick-layouts
  libqt5webenginewidgets5 libvlccore9 qml-module-qtquick-window2
  qt5-gtk-platformtheme libmagick++-6.q16-9t64 vlc qml-module-qt-labs-settings
  imagemagick libqt5sql5t64 vlc-bin libmagickcore-6.q16-7-extra libqt5qml5
  libqt5test5t64 python3-waitress python3-pip-whl vlc-l10n libqt5quickshapes5
  libwebsockets19t64 gimp-data libcjson1 libavdevice60 ffmpeg libqt5quick5
  libqt5quickparticles5 libopenexr-3-1-30 libpostproc57 python3-wheel
  vlc-plugin-samba python3-fonttools libqt5gui5t64 libmbedcrypto7t64 gimp
  libmbedtls14t64 libavcodec60 libavcodec60 libgstreamer-plugins-bad1.0-0
  qml-module-qtwebengine libzvbi0t64 libzvbi0t64 libimage-magick-q16-perl
  libqt5printsupport5t64 vlc-plugin-notify libqt5sql5-odbc libqt5webengine5
  libgraphicsmagick++-q16-12t64 libqt5concurrent5t64 libavutil58 libavutil58
  libqt5widgets5t64 imagemagick-6.q16 libswscale7
  qml-module-qt-labs-folderlistmodel python3-pip libqt5dbus5t64
  vlc-plugin-access-extra libqt5network5t64 vlc-plugin-skins2
  qml-module-qtqml-models2 libqt5opengl5t64 vlc-plugin-video-splitter
  libgimp2.0t64 libswresample4 libswresample4 imagemagick-6-common
  qml-module-qt-labs-qmlmodels fig2dev vlc-plugin-video-output
  libqt5sql5-sqlite libqt5webenginecore5 libqt5qmlmodels5 7zip libavformat60
  gstreamer1.0-plugins-bad mupdf-tools libqt5sql5-psql libglut3.12
  qml-module-qtquick2 libgraphicsmagick-q16-3t64 libqt5qmlworkerscript5
  libqt5sql5-mysql libvlc-bin libmbedx509-1t64 libqt5core5t64 qml-module-qtqml
  vlc-plugin-base vlc-plugin-visualization qml-module-qtquick-particles2
  libavfilter9 libmagickwand-6.q16-7t64
Learn more about Ubuntu Pro at https://ubuntu.com/pro
The following upgrades have been deferred due to phasing:
  alsa-ucm-conf
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.

Okay. It looks as if the update/upgrade is just not seeing anything in the Radeon repositories. I still don’t have the proper driver for my GPU hardware.

Please don’t take this as an insult…but I reluctantly resorted to Google AI. Here’s what it spit out. I’m about to reboot and give it the acid test.

Note: I was going to attach the output as a .pdf, but I can’t add an attachment here (or, if I can, it’s not obvious how), so I’m using screenshots:

And…it’s working, again. I’ll mark this as solved. Thanks for pointing me in the right direction; perhaps it will help someone else.

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