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Disable EGFX server-wide: Jump decode was the color bars (#611)

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With the server proven clean at 5160x2160 (band analysis + freerdp on
every codec), Jump still painted bars - its EGFX large-frame decode is
broken regardless of budget. drdynvc=false blocks EGFX for all clients;
clipboard/audio ride separate channels and survive. Classic codec
verified clean at 5160 via harness. Script part 3 + xrdp bounced.

Details: https://projects.knownelement.com/issues/611
This commit is contained in:
mrcharles
2026-09-01 16:52:25 -05:00
parent 1c75711647
commit 0beb30e896
2 changed files with 26 additions and 2 deletions
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12-fix-rdp-bigres.sh
+25 -1
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@@ -61,12 +61,36 @@ done
mkdir -p /etc/systemd/user/plasma-kwin_x11.service.d
cat > /etc/systemd/user/plasma-kwin_x11.service.d/bigres-timeout.conf <<'EOF'
[Unit]
[Service]
# big-res xorgxrdp sessions: software-GL init is slow; give kwin room
# instead of kill+crashloop (#611)
TimeoutStartSec=300
EOF
systemctl daemon-reload
###############################################################################
# Part 3 — EGFX off for all clients (drdynvc=false), 2026-09-01 evening
#
# Final piece of #611: with the server rendering CLEAN at 5160x2160
# (verified by band-analysis of live captures + freerdp harness on every
# codec), Jump Desktop still painted color bars down the side — its
# decode of xrdp's EGFX large frames is broken regardless of the
# compressed-frame budget. EGFX rides the drdynvc channel; blocking it
# server-side makes every client (Jump included) fall back to the
# classic codecs, which render this monitor fine. Clipboard (cliprdr)
# and audio (rdpsnd) are separate channels and survive.
###############################################################################
sed -i 's/^drdynvc=true/drdynvc=false/' /etc/xrdp/xrdp.ini
grep -q '^drdynvc=false' /etc/xrdp/xrdp.ini || { echo "drdynvc line missing; check /etc/xrdp/xrdp.ini" >&2; exit 1; }
ACTIVE=$(pgrep -c -f 'Xorg.*xrdp/xorg.conf' || true)
if [ "${ACTIVE:-0}" -gt 0 ]; then
echo "Active RDP X sessions: $ACTIVE — xrdp listener restart will blip clients;"
echo "sessions survive (sesman untouched). Apply with: systemctl restart xrdp"
else
systemctl restart xrdp
fi
echo "EGFX disabled (drdynvc=false) — clients now negotiate classic codecs."
echo "kwin unit override: /etc/systemd/user/plasma-kwin_x11.service.d/bigres-timeout.conf"
echo
echo "If a session is currently black: loginctl terminate-session <id> (or"