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Opened 21 months ago

Closed 21 months ago

Last modified 17 months ago

#2884 closed defect (fixed)

auto-refresh failure: cancelled

Reported by: Antoine Martin Owned by: Antoine Martin
Priority: critical Milestone: 4.1
Component: server Version: 3.0.x
Keywords: Cc:


Running a simple xterm with --quality=10, maximize and unmaximize until the lossy picture sticks.

Problem is that the server schedules an auto-refresh but a new damage event comes in and cancels it, without re-scheduling a new auto-refresh for some reason. (without even sending a draw packet?)

Change History (4)

comment:1 Changed 21 months ago by Antoine Martin

Status: newassigned

What happens is that the refresh is scheduled, but cancelled by size_notify_clients as the window is resized:

2020-09-23 15:04:29,590 cancel_refresh_timer(new damage 3835x2058)
  File "/usr/bin/xpra", line 10, in <module>
    sys.exit(main(sys.argv[0], sys.argv))
  File "/usr/lib64/python3.7/site-packages/xpra/scripts/main.py", line 123, in main
    return run_mode(script_file, err, options, args, mode, defaults)
  File "/usr/lib64/python3.7/site-packages/xpra/scripts/main.py", line 362, in run_mode
    return do_run_mode(script_file, error_cb, options, args, mode, defaults)
  File "/usr/lib64/python3.7/site-packages/xpra/scripts/main.py", line 512, in do_run_mode
    return run_server(error_cb, options, mode, script_file, args, current_display, progress_cb)
  File "/usr/lib64/python3.7/site-packages/xpra/scripts/server.py", line 344, in run_server
    return do_run_server(error_cb, opts, mode, xpra_file, extra_args, desktop_display, progress_cb)
  File "/usr/lib64/python3.7/site-packages/xpra/scripts/server.py", line 940, in do_run_server
    r = app.run()
  File "/usr/lib64/python3.7/site-packages/xpra/server/server_core.py", line 370, in run
  File "/usr/lib64/python3.7/site-packages/xpra/server/gtk_server_base.py", line 111, in do_run
  File "/usr/lib64/python3.7/site-packages/gi/overrides/Gtk.py", line 1630, in main
    return _Gtk_main(*args, **kwargs)
  File "/usr/lib64/python3.7/site-packages/xpra/x11/server.py", line 626, in size_notify_clients
    ss.damage(wid, window, 0, 0, nw, nh)
  File "/usr/lib64/python3.7/site-packages/xpra/server/source/windows_mixin.py", line 575, in damage
    ws.damage(x, y, w, h, damage_options)
  File "/usr/lib64/python3.7/site-packages/xpra/server/window/window_source.py", line 1334, in damage
    self.do_damage(ww, wh, x, y, w, h, options)
  File "/usr/lib64/python3.7/site-packages/xpra/server/window/window_video_source.py", line 568, in do_damage
    super().do_damage(ww, wh, x, y, w, h, options)
  File "/usr/lib64/python3.7/site-packages/xpra/server/window/window_source.py", line 1343, in do_damage

And this damage event never sends a screen update either!

Last edited 21 months ago by Antoine Martin (previous) (diff)

comment:2 Changed 21 months ago by Antoine Martin

This is caused by r17480.
The easy fix would be to take it out, or make it more clever by comparing with the refresh list:

--- xpra/server/window/window_source.py	(revision 27525)
+++ xpra/server/window/window_source.py	(working copy)
@@ -1335,9 +1335,15 @@
     def do_damage(self, ww, wh, x, y, w, h, options):
         now = monotonic_time()
-        if self.refresh_timer and (w*h>=ww*wh//4 or w*h>=512*1024):
-            #large enough screen update: cancel refresh timer
-            self.cancel_refresh_timer()
+        if self.refresh_timer and not (options.get("auto_refresh", False) or options.get("quality", 0)>=100):
+            rr = tuple(self.refresh_regions)
+            if rr:
+                #does this screen update intersect the refresh areas?
+                overlap = sum(rect.width*rect.height for rect in rr)
+                if overlap>0:
+                    pct = int(min(100, 100*overlap//(ww*wh)) * (1+self.global_statistics.congestion_value))
+                    sched_delay = max(self.min_auto_refresh_delay, int(self.base_auto_refresh_delay * pct // 100))
+                    self.refresh_target_time = max(self.refresh_target_time, now + sched_delay/1000.0)
         delayed = self._damage_delayed
         if delayed:

But we already handle intersections with the video region in window_video_source - so is this needed at all?

comment:3 Changed 21 months ago by Antoine Martin

Resolution: fixed
Status: assignedclosed
  • r27532 : don't cancel refresh
  • r27530 : timer_full_refresh was not invalidating the scroll data, so we ended up not sending a screen update at all (zero delta since the last one... which was lossy)

comment:4 Changed 17 months ago by migration script

this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/2884

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