On Thu, May 17, 2012 at 09:44:01AM -0700, Greg Kroah-Hartman wrote: > Hi Sarah and Alan, > > I've been running my usb-next branch for a while, and been seeing some > odd "stutters" with my USB keyboard and mouse that I don't see in > Linus's 3.4-rc7 kernel at the moment. > > It shows up if I use only one device or the other for a "long" time (few > minutes or so.) They seem to get "stuck" and not respond to any > keypresses or movements, until I use the other device, and then they > both wake up. > > The mouse (trackball really) is plugged into the keyboard: > > usb1 1d6b:0002 09 2.00 480MBit/s 0mA 1IFs (ehci_hcd 0000:00:1a.0) hub > 1-1 8087:0020 09 2.00 480MBit/s 0mA 1IFs (Intel Corp. Integrated Rate Matching Hub) hub > 1-1.3 045e:001c 09 1.10 12MBit/s 64mA 1IFs (Microsoft Corp. Internet Keyboard Pro) hub > 1-1.3.1 045e:001d 00 1.10 1.5MBit/s 100mA 2IFs (Microsoft Corp. Natural Keyboard Pro) > 1-1.3.2 045e:0023 00 1.10 1.5MBit/s 100mA 1IFs (Microsoft Microsoft Trackball Optical®) > 1-1.4 046d:082d ef 2.00 480MBit/s 500mA 4IFs (Logitech, Inc. F8EE46FF) > usb2 1d6b:0002 09 2.00 480MBit/s 0mA 1IFs (ehci_hcd 0000:00:1d.0) hub > 2-1 8087:0020 09 2.00 480MBit/s 0mA 1IFs (Intel Corp. Integrated Rate Matching Hub) hub > 2-1.8 07cc:0501 00 2.00 480MBit/s 500mA 1IFs (USB2.0 CardReader 1234609 ) > > Any ideas, or hints on what might be happening here? Do you have runtime PM turned on for your EHCI host controllers? I know several kernel developers have scripts that turn that on automatically. Do you have autosuspend turned on for your mouse and keyboard? That behavior sort of sounds like the devices are getting stuck in suspend. Either that or an EHCI scheduling bug? > Have either of you > noticed this recently? I can try to bisect, but it might be tough, as > it's not the most repeatable thing to reproduce. I've been running the usb-next branch on the xHCI host, and I haven't noticed anything odd. I'll try running it on my Intel box with a rate matching EHCI host instead and see if I notice the same behavior. Sarah Sharp -- 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
