On Sun, 21 Aug 2005, Norbert Preining wrote: > Hi USB developers, hi Andrew! > > On Mon, 21 Mär 2005, preining wrote: > > Dear usb developers, dear Andrew! > > > > I found that my builtin sd card reader connected via USB port > > experiences several connect/reconnect cycles every time I boot. > > > > I am using 2.6.11-mm4. > > Same now with 2.6.13-rc6-mm1. This time it got really bad: > > Aug 20 14:00:19 gandalf vmunix: usb 2-2: USB disconnect, address 2 > Aug 20 14:00:19 gandalf kernel: usb 2-2: new full speed USB device using > uhci_hcd and address 3 > Aug 20 14:00:19 gandalf kernel: scsi1 : SCSI emulation for USB Mass Storage > devices > Aug 20 14:00:19 gandalf kernel: usb-storage: device found at 3 > Aug 20 14:00:19 gandalf kernel: usb-storage: waiting for device to settle > before scanning > Aug 20 14:00:21 gandalf usb.agent[6109]: usb-storage: already loaded > Aug 20 14:00:24 gandalf vmunix: Vendor: Generic Model: Flash R/W > Rev: 2002 > Aug 20 14:00:24 gandalf vmunix: Type: Direct-Access > ANSI SCSI revision: 02 > Aug 20 14:00:24 gandalf vmunix: Attached scsi removable disk sda at scsi1, > channel 0, id 0, lun 0 > Aug 20 14:00:24 gandalf kernel: usb-storage: device scan complete > Aug 20 14:00:26 gandalf scsi.agent[6154]: sd_mod: loaded successfully > (for disk)
> Unfortunately I cannot in any way track down this problem to specific > kernels, or specific work situations. It sometimes happens, sometimes > not. > > If anyone has any idea how to debug such a stupid problem, I would be > glad. Speaking in broad terms, it's normal to see new device connection and configuration messages like the ones above when a USB device is plugged in to your computer. What's not normal is to see disconnects. So you should be concentrating on what happens just before the log entries you posted -- why is the card reader disconnecting? Turning on CONFIG_USB_DEBUG may provide more help. Alan Stern - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
