Streaming via Sunshine
Encoding
Sunshine v2026.516.143833+ needs NVENC SDK 13.0/driver 570+, but Debian nonfree only ships driver 550 (NVENC API 12.2), so it was silently falling back to CPU x264.
Downgrading to Sunshine v2025.924.154138 restored NVENC (H.264 + HEVC, no AV1 — GPU is Turing-or-earlier) — latency dropped from ~65–84ms to <15ms, steady 60fps. Sunshine should stay pinned to that version until Debian ships a 570+ driver.
Apps
4K Desktop
do command
sh -c "/usr/bin/nvidia-settings --assign CurrentMetaMode='DFP-0: 1920x1080 {ViewPortIn=3840x2160, ViewPortOut=1920x1080+0+0, Panning=3840x2160}'"undo command
sh -c "/usr/bin/nvidia-settings --assign CurrentMetaMode='DFP-0: 1920x1080 {ViewPortIn=1920x1080, ViewPortOut=1920x1080+0+0, Panning=1920x1080}'"Quake
command
quakespasm -basedir /usr/share/games/quake/Steam
undo command
/usr/bin/flatpak run --branch=stable --arch=x86_64 --command=/app/bin/steam --file-forwarding com.valvesoftware.Steam -shutdowndetached command
/usr/bin/flatpak run --branch=stable --arch=x86_64 --command=/app/bin/steam --file-forwarding com.valvesoftware.Steam steam://open/bigpicture