Launchpad has imported 4 comments from the remote bug at http://bugs.freedesktop.org/show_bug.cgi?id=19736.
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 2009-01-25T11:28:36+00:00 Jostein Bø Fløystad wrote: Using powertop to monitor cpu wakeups on a laptop on battery (my case: thinkpad t400), the number of wakeups rises for the "PS/2 keyboard/mouse/touchpad" from less than five to around 400 hundred or more (resulting in a rise in power consumption of 2-3 Watts in most cases -- quite significant on a laptop) when the touchpad is used. How to reproduce: Start powertop as root when the machine is idle and wait for it to stablize it's measurements. Then move the pointer around a lot, and wait for powertop to refresh its readings. The same effect is not seen while typing. The same issue has also been reported elsewhere: Ubuntu bug report: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/194489 Arch linux forum thread: http://bbs.archlinux.org/viewtopic.php?pid=486690 As the same appears on different distributions and kernel versions, it is likely to be caused by the driver, although I can't be sure. My system specs: Lenovo Thinkpad T400 Synaptics touchpad (part of an UltraNav) Arch Linux x86_64 version 0.99.3 of xf86-input-synaptics Reply at: https://bugs.launchpad.net/linux/+bug/194489/comments/17 ------------------------------------------------------------------------ On 2009-01-25T11:33:18+00:00 Jostein Bø Fløystad wrote: Created an attachment (id=22229) Output from powerto -d with touchpad movement Reply at: https://bugs.launchpad.net/linux/+bug/194489/comments/18 ------------------------------------------------------------------------ On 2009-01-25T11:34:34+00:00 Jostein Bø Fløystad wrote: Created an attachment (id=22230) Output from powerto -d without touchpad movement Reply at: https://bugs.launchpad.net/linux/+bug/194489/comments/19 ------------------------------------------------------------------------ On 2009-02-01T14:56:19+00:00 Peter Hutterer wrote: >From the original bugreport: "powertop reports a huge amoun of wakeups from the touchpad. Notice that this is independent of the synaptics driver being loaded or not. I get the exact same results with an out of the box xorg.conf where the touchpad is recognized as a plain mouse. The screenshot shows the problem." This is a kernel issue, not one of the X.Org synaptics driver -> NOTOURBUG. Reply at: https://bugs.launchpad.net/linux/+bug/194489/comments/20 ** Changed in: xorg-driver-synaptics Status: Invalid => Won't Fix ** Changed in: xorg-driver-synaptics Importance: Unknown => Medium -- ps2 synaptics touchpad causing huge amounts of wakeups https://bugs.launchpad.net/bugs/194489 You received this bug notification because you are a member of Registry Administrators, which is the registrant for XOrg-Driver-Synaptics. _______________________________________________ Mailing list: https://launchpad.net/~registry Post to : [email protected] Unsubscribe : https://launchpad.net/~registry More help : https://help.launchpad.net/ListHelp
