(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). It looks like we need to revisit this - 2.6.26 worked OK, so why can't 2.6.28? Thanks. On Tue, 21 Apr 2009 19:53:13 GMT bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=13145 > > Summary: Processor does not go below C2 if mouse (uhci) is > plugged in. > Product: Drivers > Version: 2.5 > Kernel Version: 2.6.29 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: USB > AssignedTo: greg@xxxxxxxxx > ReportedBy: daniel.smoczyk@xxxxxxxxx > Regression: Yes > > > Created an attachment (id=21071) > --> (http://bugzilla.kernel.org/attachment.cgi?id=21071) > lsusb -v > > Latest working kernel version: > 2.6.26-13 > > Earliest failing kernel version: > 2.6.28 > > Distribution: > Debian Sid > > Hardware Environment: > IBM Thinkpad T41 Pentium M > > Problem Description: > In 2.6.28(29) kernel, when I plug in usb logitech mouse, regression in uhci (I > assume it's usb uhci driver) forces processor to operate in C2 state (reported > by powertop 1.11). When I plug it off, everything back to normal - 100% C3 in > idle. In 2.6.26 kernel processor normally goes down to C3 when mouse is plugged > in. > > I think this problem was already reported in this bug [1] and closed without > proper investigation. Arjan van de Ven stated that "When USB is used C3 cannot > be entered" argument isn't correct [2]. > > I'll provide any additional debug data if needed. > > [1] http://bugzilla.kernel.org/show_bug.cgi?id=12391 > [2] http://www.bughost.org/pipermail/power/2009-March/001617.html > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
