mrcharles
9a88b2c7ee
Full RDP clean slate requires killing session processes AND stopping user@UID (sessions live in the system sesman cgroup - reconnect into a survivor never restarts the user manager). 150% HiDPI + core cursors persisted both accounts. Display-performance work (16K compressed-PDU drops, staged 1MB send buffer, EGFX-at-24bpp retest) captured as #679. Details: https://projects.knownelement.com/issues/679
135 lines
6.5 KiB
Bash
Executable File
135 lines
6.5 KiB
Bash
Executable File
#!/bin/bash
|
|
# 12-fix-rdp-bigres.sh — xrdp EGFX big-resolution fix (Redmine #611)
|
|
#
|
|
# Symptom: Jump Desktop from iPad -> big external monitor (5160x2160)
|
|
# showed color bars / cut sides. Root cause candidate: default EGFX
|
|
# compressed-frame budget truncates large frames at this width.
|
|
# freerdp UAT at 5160x2160 (all codecs + mid-session resize) is clean;
|
|
# this mitigation raises the budget for the Jump client path.
|
|
#
|
|
# Idempotent: run as root on ultix-streaming.
|
|
|
|
set -euo pipefail
|
|
|
|
DROPIN=/etc/systemd/system/xrdp.service.d/bigres.conf
|
|
|
|
mkdir -p "$(dirname "$DROPIN")"
|
|
cat > "$DROPIN" <<'EOF'
|
|
[Service]
|
|
Environment=XRDP_GFX_MAX_COMPRESSED_BYTES=33554432
|
|
Environment=XRDP_GFX_FRAMES_IN_FLIGHT=2
|
|
EOF
|
|
|
|
systemctl daemon-reload
|
|
# bounce only when nobody is connected: check for active RDP sessions first
|
|
ACTIVE=$(pgrep -c -f 'Xorg.*xrdp/xorg.conf' || true)
|
|
if [ "${ACTIVE:-0}" -gt 0 ]; then
|
|
echo "Active RDP X sessions: $ACTIVE — NOT restarting; apply at next bounce with:"
|
|
echo " systemctl restart xrdp-sesman xrdp"
|
|
else
|
|
systemctl restart xrdp-sesman xrdp
|
|
sleep 2
|
|
systemctl is-active xrdp xrdp-sesman
|
|
fi
|
|
|
|
grep -q XRDP_GFX_MAX_COMPRESSED_BYTES "$DROPIN" && echo "drop-in present: $DROPIN"
|
|
|
|
###############################################################################
|
|
# Part 2 — kwin_x11 black-screen fix (root-caused 2026-09-01, #611)
|
|
#
|
|
# Symptom: RDP login -> KDE spinner -> BLACK screen. Server-side bisect
|
|
# showed display :10 rendering pure black (colors=1): kwin_x11 was
|
|
# crash-looping (plasma-kwin_x11.service "start operation timed out",
|
|
# restart counter 12+). Cause: software-GL compositing init under
|
|
# xorgxrdp (no DRI) at 5160x2160 never finishes inside the unit's
|
|
# start timeout; systemd kills kwin -> no desktop. The "spinner" the
|
|
# user sees is KSplash firing on every kwin restart.
|
|
#
|
|
# Fix: disable X11 compositing for the RDP accounts (kwin runs
|
|
# uncomposited = instant, no GL) and give the kwin unit start-time
|
|
# headroom. Wayland console session unaffected (Compositing/Enabled is
|
|
# an X11-only key). Verified with the freerdp harness on rdptest:
|
|
# fresh 1408x945 / fresh 5160x2160 / resize up mid-session / resize
|
|
# down on reconnect — all render real desktops.
|
|
###############################################################################
|
|
|
|
for ACCOUNT in reachableceo reachableceo-offstage; do
|
|
runuser -u "$ACCOUNT" -- kwriteconfig6 --file kwinrc \
|
|
--group Compositing --key Enabled false
|
|
echo "kwinrc Compositing=false: $ACCOUNT"
|
|
done
|
|
|
|
mkdir -p /etc/systemd/user/plasma-kwin_x11.service.d
|
|
cat > /etc/systemd/user/plasma-kwin_x11.service.d/bigres-timeout.conf <<'EOF'
|
|
[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; }
|
|
|
|
###############################################################################
|
|
# Part 4 — max_bpp=24: the actual color-bars root cause (2026-09-01 night)
|
|
#
|
|
# With EGFX off, Jump's fallback is classic bitmap tiles — and xrdp's
|
|
# bitmap path DROPS tiles with "libxrdp_send_bitmap: error, decompressed
|
|
# size too big: 20640 bytes" because 5160 px * 4 Bpp overflows the 16K
|
|
# row buffer. Jump paints the dropped tiles as bars. At 24bpp the row
|
|
# is 15480 bytes and fits. (freerdp never hit this: it negotiates
|
|
# NSCodec/planar after EGFX goes away.)
|
|
###############################################################################
|
|
|
|
sed -i 's/^max_bpp=.*/max_bpp=24/' /etc/xrdp/xrdp.ini
|
|
grep -q '^max_bpp=24' /etc/xrdp/xrdp.ini || { echo "max_bpp 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."
|
|
|
|
###############################################################################
|
|
# Part 5 — session hygiene (2026-09-01 night, #611 close-out)
|
|
#
|
|
# - sesman.ini: KillDisconnected=false + DisconnectedTimeLimit=0 — human
|
|
# keeps apps up 24x7 and reconnects at will.
|
|
# - xrdp.ini: tcp_nodelay/tcp_keepalive=true so dead client connections
|
|
# (iPad backgrounding Jump) are detected; reconnects then RESUME the
|
|
# existing session instead of spawning duplicates.
|
|
# - THE CLEAN SLATE, when a login black-screens and nothing else works:
|
|
# TWO layers must both go, or reconnects black-screen:
|
|
# a) the RDP sessions themselves (system cgroup! user@UID stop does
|
|
# NOT reach them): stop xrdp; pkill xrdp-sesexec + the xrdp Xorgs
|
|
# b) the systemd --user manager, which accumulates poisoned state
|
|
# (stale DISPLAY env, wedged dbus name waits; plasma units are
|
|
# Type=dbus and hang "activating" at ~0% CPU): systemctl stop user@<uid>
|
|
# Reconnecting into a SURVIVING session does not restart the user
|
|
# manager -> black screen. Kill both, then start xrdp and reconnect.
|
|
###############################################################################
|
|
|
|
grep -q '^DisconnectedTimeLimit=0' /etc/xrdp/sesman.ini || sed -i 's/^DisconnectedTimeLimit=.*/DisconnectedTimeLimit=0/' /etc/xrdp/sesman.ini
|
|
grep -qE '^tcp_keepalive' /etc/xrdp/xrdp.ini || printf 'tcp_keepalive=true\ntcp_nodelay=true\n' >> /etc/xrdp/xrdp.ini
|
|
echo "session hygiene present (DisconnectedTimeLimit=0, tcp keepalives)."
|
|
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"
|
|
echo "loginctl terminate-user <user> for their RDP sessions) and reconnect."
|