Launchpad has imported 8 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=39226.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2011-07-14T15:42:56+00:00 Oliver-joos-freenet wrote: I use Ubuntu 10.04.2 LTS with xorg 1:7.5+5ubuntu1 and xserver-xorg- input-synaptics 1.2.2-1ubuntu4 To reproduce start a terminal and execute 1. killall syndaemon 2. syndaemon -i 4.0 -k 3. then press keys and move pointer with touchpad at once Two things go wrong: * syndaemon writes "Disable" and "Enable" to stdout, but enables not always 4.0 secs after the last keypress. * quite often the pointer still moves although syndaemon says it is disabled. Details have been well explained by Stanley Sokolow as comment #20 on http://launchpad.net/bugs/27541 which is one of many duplicates of http://launchpad.net/bugs/240738. The low default timeout of 0.5 secs in Ubuntu makes it even worse and seems a workaround for http://launchpad.net/bugs/801763 Due to recent diversity of touchpad hardware this bug gains publicity. I found that Macbooks, newer Samsung laptops and Asus EeePCs are among the affected systems. See my findings with Elantech touchpads in comment #27 of http://launchpad.net/bugs/240738 Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/28 ------------------------------------------------------------------------ On 2011-07-15T12:03:56+00:00 Mike wrote: Not to toot my own horn here, but I contacted Peter Osterlund, the author of the syndaemon man page, and his response suggests that it isn't just a simple change of the default timing as suggested in comment 20 of the aforementioned bug: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/240738/comments/5 Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/29 ------------------------------------------------------------------------ On 2011-07-28T01:08:05+00:00 Peter Hutterer wrote: Did you try using the record extension instead of polling? syndaemon -R -i 4.0 -k Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/30 ------------------------------------------------------------------------ On 2011-08-13T13:19:52+00:00 Bugs-freedesktop-org-20-kuijsten wrote: Using the undocumented option "-m 20" on syndaemon, as mentioned in LP #240738, made the situation a lot better for me. At least most keypresses are catched now. Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/34 ------------------------------------------------------------------------ On 2011-08-13T13:38:48+00:00 Bugs-freedesktop-org-20-kuijsten wrote: (In reply to comment #2) > Did you try using the record extension instead of polling? > > syndaemon -R -i 4.0 -k If you press a key real quick it still misses it sometimes (apart from the fact that not being able to click for 4 seconds after the last letter you typed is very annoying by itself). I experimented with this undocumented switch -m to change the polling interval and running "syndaemon -R -i 0.5 -k -m 20", which changes the default polling interval of 200ms to 20ms, results in no more noticeable key presses being missed. Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/35 ------------------------------------------------------------------------ On 2011-08-14T22:22:36+00:00 Peter Hutterer wrote: If you use -R, the -m argument is ignored. Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/36 ------------------------------------------------------------------------ On 2012-03-14T04:27:39+00:00 Peter Hutterer wrote: (In reply to comment #3) > Using the undocumented option "-m 20" on syndaemon, commit 72d5b4886927aee5fbc871b5c3d0300be92d8ecc Author: Peter Hutterer <peter.hutte...@who-t.net> Date: Thu Jul 28 10:43:38 2011 +1000 man: document syndaemon -m switch Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/39 ------------------------------------------------------------------------ On 2012-03-14T04:38:46+00:00 Peter Hutterer wrote: Closing as fixed as per comment #4. Since -m 20 is ignored if -R is given, I can assume that -R is enough to fix the issue. GNOME also uses the -R flag nowadays, see https://bugzilla.gnome.org/show_bug.cgi?id=639623 Long story short, any polling suffers from race condition, so this cannot be fixed in normal mode. Reply at: https://bugs.launchpad.net/xserver-xorg-input- synaptics/+bug/240738/comments/40 ** Changed in: xserver-xorg-input-synaptics Status: Confirmed => Fix Released ** Bug watch added: GNOME Bug Tracker #639623 https://bugzilla.gnome.org/show_bug.cgi?id=639623 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-input-synaptics in Ubuntu. https://bugs.launchpad.net/bugs/240738 Title: syndaemon sometimes fails to disable the touchpad To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-input-synaptics/+bug/240738/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
