jeena/jtube-tv
1
0
Fork 0
Code Issues 5 Pull requests Projects Releases Packages Wiki Activity Actions

emu: pin windowed mode to the integrated GPU

Browse source 
The discrete card now runs continuous AI inference, so the emulator must
not claim GL/Vulkan contexts on it. In windowed mode the emulator uses
the host GL/Vulkan stack, and the default GLVND selection picks the
discrete card on this machine. The script now discovers the first
display device whose driver is not nvidia and pins the emulator process
to it (Mesa GLX/EGL + DRI_PRIME + the Intel Vulkan ICD).

Headless (the default) needs no change: it always ran on swiftshader,
strictly software, and never touched any GPU.

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Jeena 2026-10-19 13:30:52 +00:00
parent e9cb32b173
commit 730bda0b40
1 changed files with 35 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

35
scripts/start-emulator.sh
View file

@ -76,6 +76,41 @@ if [ -e /dev/kvm ]; then
echo "/dev/kvm found — hardware acceleration on" echo "/dev/kvm found — hardware acceleration on"
fi fi
# Pin the emulator process to the integrated GPU so the discrete card stays free
# for AI inference (windowed mode uses the host GL/Vulkan stack; headless runs on
# swiftshader — pure software — and never touches any GPU at all). Discovered
# from the PCI tree: first display device NOT driven by the nvidia driver.
IGPU=""
for dev in /sys/bus/pci/devices/*; do
class=$(cat "$dev/class" 2>/dev/null) || continue
case "$class" in
0x0300*|0x0380*) ;; # VGA / display controller
*) continue ;;
esac
if [ "$(basename "$(readlink "$dev/driver" 2>/dev/null)")" = nvidia ]; then continue; fi
IGPU=$(basename "$dev")
break
done
if [ -n "$IGPU" ]; then
# Mesa GL/GLES: force the Mesa vendors, then the Intel render device.
export __GLX_VENDOR_LIBRARY_NAME=mesa
export __EGL_VENDOR_LIBRARY_FILENAMES=/usr/share/glvnd/egl_vendor.d/50_mesa.json
export DRI_PRIME="pci-${IGPU//./_}"
# Vulkan: restrict the loader to the iGPU's ICD (both var names — loader
# version differences).
for icd in /usr/share/vulkan/icd.d/intel_icd.x86_64.json \
/usr/share/vulkan/icd.d/Intel_icd.x86_64.json; do
if [ -f "$icd" ]; then
export VK_ICD_FILENAMES="$icd"
export VK_DRIVER_FILES="$icd"
break
fi
done
echo "GPU pinned to iGPU $IGPU (Mesa/Intel env) — dGPU untouched"
else
echo "no iGPU found — leaving GPU selection to the driver (dGPU may be used)"
fi
# --- build combined adb vendor-keys file ------------------------------------ # --- build combined adb vendor-keys file ------------------------------------
# The TV system image is a user build: adb push to /data/misc/adb/adb_keys is # The TV system image is a user build: adb push to /data/misc/adb/adb_keys is
# blocked, so remote keys are trusted via ADB_VENDOR_KEYS at launch instead. # blocked, so remote keys are trusted via ADB_VENDOR_KEYS at launch instead.