oscar/configuration.nix

@@ -147,7 +147,6 @@
       # command line applications
       iperf
       units
-      yt-dlp
 
       # command line utilities
       alsa-utils

oscar/hardware-configuration.nix

@@ -11,10 +11,20 @@
   boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "thunderbolt" "usb_storage" "sd_mod" ];
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-amd" ];
-  # Kernel >6.15.? breaks wired networking on the dock. This has been reported
-  # in Fedora fora:
-  # https://discussion.fedoraproject.org/t/fedora-42-driver-issues-with-kernel-6-15-thunderbolt-docking-station-igb-usb/157039
-  boot.kernelPackages = pkgs.linuxPackages_latest;
+  # It's been a busy month with dock issues! Two specific kernel constraints:
+  # 1. We're, for the moment, stuck on the LTS kernel because kernels >6.15.?
+  #    break wired networking on the dock. This has been reported in Fedora
+  #    fora:
+  #    https://discussion.fedoraproject.org/t/fedora-42-driver-issues-with-kernel-6-15-thunderbolt-docking-station-igb-usb/157039
+  # 2. "drm/dp: Change AUX DPCD probe address from DPCD_REV to LANE0_1_STATUS"
+  #    (included in 6.12.44, so we're pinned to one release earlier) breaks
+  #    external DisplayPort displays on the Thunderbolt Dock. Issue tracker:
+  #    https://gitlab.freedesktop.org/drm/amd/-/issues/4500
+  #    A patch has been developed as of 2025-09-03, but no fix yet. Also
+  #    believed to be broken in 6.16.0 and newer.
+  #    via https://discuss.cachyos.org/t/thunderbolt-dock-dp-displays-no-longer-working/14695/2
+  boot.kernelPackages = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/b98378bf28d97644078e1c56d10dc7819d643cbf~.tar.gz") {}).linuxPackages; # before 6.12.44 upgrade
+
   boot.extraModulePackages = [ ];
 
   fileSystems."/" =