Bug 216679

Summary:	x11-drivers/synaptics: syndaemon wakes cpu too often
Product:	Gentoo Linux	Reporter:	Roland Tapken <gentoo>
Component:	Current packages	Assignee:	X11 External Driver Maintainers <x11-drivers>
Status:	RESOLVED FIXED
Severity:	enhancement	CC:	gentoobugzilla, ixevix
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge info Novell patch

Description Roland Tapken 2008-04-07 10:28:09 UTC

Using powertop I found out that syndaemon wakes up the CPU very often. It uses a polling interval of 20ms. The patch at http://support.zenwalk.org/viewtopic.php?f=5&t=12979 increases this time to 200ms which should be sufficient. Maybe this could be added to the ebuild with an "incpoll"-useflag?

Reproducible: Always

Comment 1 Tom Kirchner 2008-06-30 03:01:08 UTC

The patch at the Novell bugzilla allows for a configurable polling interval, which would be a better option.  https://bugzilla.novell.com/show_bug.cgi?id=386709

Comment 2 Krister Bäckman 2008-07-18 13:52:46 UTC

Created attachment 160725 [details]
emerge info

The Novell patch works well and with a setting of syndaemon -m 500 I can lower the number of wakeups from it. I tried this on x86 architecture by applying the patch to the synaptics-0.14.6 ebuild.

Comment 3 Krister Bäckman 2008-07-18 14:10:16 UTC

Created attachment 160726 [details]
Novell patch

Comment 4 Samuli Suominen (RETIRED) gentoo-dev

2008-07-30 13:13:09 UTC

+*synaptics-0.14.6-r3 (30 Jul 2008)
+
+  30 Jul 2008; Samuli Suominen <drac@gentoo.org>
+  +files/synaptics-0.14.6-configurable_polling_interval.patch,
+  +synaptics-0.14.6-r3.ebuild:
+  Apply configurable polling interval patch from Novell so that syndaemon
+  doesn't wake up CPU so often. Bug 216679, thanks to Roland Tapken, Thomas
+  Kirchner and Krister Bäckman.