Re: random USB disconnect, 2.6.23-rcX
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.user |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 21 Sep 2007, markus reichelt wrote: > Hi list, > > I've noticed a strange USB disconnect of an external HDD. There's > several USB devices connected to this machine at all times, mostly > hubs, but some directly connected HDD gets hit by this issue. > > It's reproducable under normal usage; tho I'm not sure what triggers > it. It has happened both while accessing the HDD and during idle > times. For what it matters, I replaced the HDD enclosure of a cypress > chipset with a genesys logic one... doesn't matter. > > 2.6.23-rcX (this one is rc7) > > dmesg output: > > hub 1-0:1.0: state 7 ports 8 chg 0000 evt 0010 > ehci_hcd 0000:00:02.2: GetStatus port 4 status 001002 POWER sig=se0 > CSC > hub 1-0:1.0: port 4, status 0100, change 0001, 12 Mb/s > usb 1-4: USB disconnect, address 3 That was the disk disconnecting. Pretty much everything that follows is irrelevant: We don't need to know what happened _after_ the drive disconnected -- we need to know what happened _before_ (i.e., what caused the disconnect). A usbmon trace would be helpful. See the instructions in Documentation/usb/usbmon.txt. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users