docker: fix hw decode

install/docker/install-intel-graphics.sh

@@ -4,7 +4,8 @@ then
     exit 0
 fi
 
-# this script previvously apt install intel-media-va-driver-non-free, but that seems to no longer be necessary.
+# no errors beyond this point
+set -e
 
 # the intel provided script is disabled since it does not work with the 6.8 kernel in Ubuntu 24.04 or Proxmox 8.2.
 # manual installation of the Intel graphics stuff is required.
@@ -18,11 +19,19 @@ fi
 # apt-get -y install intel-opencl-icd &&
 # apt-get -y dist-upgrade;
 
+# need intel-media-va-driver-non-free, but all the other intel packages are installed from Intel github.
+echo "Installing Intel graphics packages."
+apt-get update && apt-get install -y gpg-agent &&
+rm -f /usr/share/keyrings/intel-graphics.gpg &&
+curl -L https://repositories.intel.com/graphics/intel-graphics.key | gpg --dearmor --yes --output /usr/share/keyrings/intel-graphics.gpg &&
+echo 'deb [arch=amd64,i386 signed-by=/usr/share/keyrings/intel-graphics.gpg] https://repositories.intel.com/graphics/ubuntu jammy arc' | tee  /etc/apt/sources.list.d/intel.gpu.jammy.list &&
+apt-get -y update &&
+apt-get -y intel-media-va-driver-non-free &&
+apt-get -y dist-upgrade;
+
 # manual installation
 # https://github.com/intel/compute-runtime/releases/tag/24.13.29138.7
 
-# no errors beyond this point
-set -e
 
 rm -rf /tmp/gpu && mkdir -p /tmp/gpu && cd /tmp/gpu