Re: Problems with USB port and a dongle + recompilation with USB support
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Mon, 12 Feb 2007, Thibaud Hulin wrote: > Hello! > > I've been a little longer, but I could recompiled my kernel with the > debug USB support. > And this is the result of dmesg command : ... > [ 200.748000] usb 1-1: usb auto-suspend > [ 205.920000] usb 1-1: usb auto-resume > [ 205.968000] usb 1-1: finish resume > [ 207.972000] usb 1-1: usb auto-suspend > [ 211.264000] usb 1-1: usb auto-resume > [ 211.312000] usb 1-1: finish resume > [ 214.620000] usb 1-1: usb auto-suspend > [ 214.972000] usb 1-1: usb auto-resume > [ 215.096000] usb 1-1: finish resume > [ 224.940000] usb 1-1: usb auto-suspend > [ 228.864000] usb 1-1: usb auto-resume > [ 228.912000] usb 1-1: finish resume > [ 232.348000] usb 1-1: usb auto-suspend > [ 238.788000] usb 1-1: usb auto-resume > [ 238.836000] usb 1-1: finish resume > [ 238.836000] usb 1-1: uhci_result_common: failed with status 440000 > [ 238.844000] usb 1-1: gone after usb resume? status -71 > [ 238.848000] usb 1-1: can't resume, status -71 > [ 238.848000] usb 1-1: USB disconnect, address 2 The dongle gets suspended when it's not being used. Apparently you run some program that uses the dongle at 5- or 10-second intervals; this causes the device to wake up and then be suspended again. It looks like the dongle can't handle more than a few cycles of this -- after 5 cycles it stopped working entirely. You can change the autosuspend delay by altering the value of USB_AUTOSUSPEND_DELAY in the kernel source file drivers/usb/core/usb.h. For example, setting it to (HZ*60) will cause the suspend to happen only after 60 seconds of inactivity. Or you can prevent USB devices from being suspended entirely by turning off the CONFIG_USB_SUSPEND setting. Alan Stern ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel