On Wed, Apr 24, 2013 at 10:32 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Wed, 24 Apr 2013, Sedat Dilek wrote: > >> > [ CC linux-pm and linux-usb (ehci) folks ] >> > >> > This happens with my external USB mouse after suspend/resume. >> > >> > Excerpt (full dmesg and kernel-config attached): >> > >> > $ dmesg | egrep -i 'usb|async' | grep 1-1.2 >> > [ 1.258602] usb 1-1.2: new low-speed USB device number 3 using ehci-pci >> > [ 1.368649] usb 1-1.2: New USB device found, idVendor=046d, idProduct=c00e >> > [ 1.368661] usb 1-1.2: New USB device strings: Mfr=1, Product=2, >> > SerialNumber=0 >> > [ 1.368668] usb 1-1.2: Product: USB-PS/2 Optical Mouse >> > [ 1.368672] usb 1-1.2: Manufacturer: Logitech >> > [ 1.957999] input: Logitech USB-PS/2 Optical Mouse as >> > /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/input/input4 >> > [ 62.353997] usb 1-1.2: reset low-speed USB device number 3 using ehci-pci >> > [ 62.636893] PM: Device 1-1.2 failed to resume async: error -32 >> > [ 64.243543] usb 1-1.2: USB disconnect, device number 3 >> > [ 64.380328] usb 1-1.2: new low-speed USB device number 5 using ehci-pci >> > [ 64.477612] usb 1-1.2: New USB device found, idVendor=046d, idProduct=c00e >> > [ 64.477618] usb 1-1.2: New USB device strings: Mfr=1, Product=2, >> > SerialNumber=0 >> > [ 64.477621] usb 1-1.2: Product: USB-PS/2 Optical Mouse >> > [ 64.477623] usb 1-1.2: Manufacturer: Logitech >> > [ 64.481934] input: Logitech USB-PS/2 Optical Mouse as >> > /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/input/input11 >> > > > Did this work differently under earlier kernels? > Unfortunately, s/r did not work for several Linux-Next releases as there is missing tglx's patch pendinging in tip.git/timers/core. The last days I also use the touchpad, so the issue is new to me, which says not that much :-). [1] http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?h=timers/core&id=77c675ba18836802f6b73d2d773481d06ebc0f04 >> Thos 3 lines IIRC are important (one line missing above): >> >> [ 62.353997] usb 1-1.2: reset low-speed USB device number 3 using ehci-pci >> [ 62.636877] dpm_run_callback(): usb_dev_resume+0x0/0x20 returns -32 >> [ 62.636893] PM: Device 1-1.2 failed to resume async: error -32 >> >> - Sedat - >> >> > Any help/hints/infos welcome :-)! > > This indicates that the optical mouse didn't survive the suspend/resume > sequence and had to be reenumerated. Without more information, there's > no way to tell specifically what went wrong during the initial reset at > timestamp 62.353997. > > If you want to pursue this farther, you could enable CONFIG_USB_DEBUG. > You could also collect a usbmon trace for bus 1 showing what happens > during the suspend and resume. > Hmm, I can try to enable CONFIG_USB_DEBUG and build a new kernel. Can you give me more hints how to do a usbmon-trace? > On the other hand, what difference does it really make if a mouse has > to be reenumerated? > As a non-USB-expert it's hard to interprete such "bogus" lines in your logs. I am curious enough to ask which is fair :-). AFAICS in your eyes this is "harmless"? Thanks for the fast as lightning reply! - Sedat - > Alan Stern >
