Hi, One of my two USB memory sticks fails to register correctly when hotplugging for 2.6.10; it works when coldplugging and in 2.6.9.
I have two 128MB USB 2.0 memory sticks: a Buffalo Clipdrive and a Lexar Jumpdrive. Both worked flawlessly in 2.6.8.1 and 2.6.9. The Jumpdrive works as expected in 2.6.10, but the Clipdrive no longer hotplugs. On plugging the Clipdrive in 2.6.10, I get this dmesg output: usb 4-3: new high speed USB device using ehci_hcd and address 2 usb 2-1: new full speed USB device using uhci_hcd and address 2 usb 2-1: device descriptor read/64, error -71 usb 2-1: device descriptor read/64, error -71 usb 2-1: new full speed USB device using uhci_hcd and address 3 usb 2-1: device descriptor read/64, error -71 usb 2-1: device descriptor read/64, error -71 (I've appended the output with verbose usb debugging enabled at the end of the message). After this output, no new device appears in /proc/bus/usb/devices. This is fixed by first unloading ehci_hcd, as suggested in a previous post (http://article.gmane.org/gmane.linux.usb.user/11411), giving this output in dmesg: usb 2-1: new full speed USB device using uhci_hcd and address 2 ub: sizeof ub_scsi_cmd 64 ub_dev 2472 uba: device 2 capacity nsec 256000 bsize 512 uba: device 2 capacity nsec 256000 bsize 512 /dev/ub/a: p1 usbcore: registered new driver ub Coldplugging also works, with ehci_hcd giving the following in dmesg: usb 4-3: new high speed USB device using ehci_hcd and address 2 usb 4-3: khubd timed out on ep0in usb 4-3: device descriptor read/64, error -110 uba: device 2 capacity nsec 256000 bsize 512 uba: device 2 capacity nsec 256000 bsize 512 /dev/ub/a: p1 and this new device in /proc/bus/usb/devices: T: Bus=04 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 2 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0ea0 ProdID=2168 Rev= 2.00 S: Manufacturer=BUFFALO S: Product=ClipDrive S: SerialNumber=B1098404451000E3 C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 3 Cls=08(stor.) Sub=06 Prot=50 Driver=ub E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=83(I) Atr=03(Int.) MxPS= 2 Ivl=125us Plugging in the Clipdrive in 2.6.9 works; here is the dmesg output: usb 4-3: new high speed USB device using address 2 SCSI subsystem initialized Initializing USB Mass Storage driver... scsi0 : SCSI emulation for USB Mass Storage devices Vendor: BUFFALO Model: ClipDrive Rev: 2.00 Type: Direct-Access ANSI SCSI revision: 02 USB Mass Storage device found at 2 usbcore: registered new driver usb-storage USB Mass Storage support registered. sda: Unit Not Ready, sense: Current : sense key Unit Attention Additional sense: Not ready to ready change, medium may have changed SCSI device sda: 256000 512-byte hdwr sectors (131 MB) sda: assuming Write Enabled sda: assuming drive cache: write through /dev/scsi/host0/bus0/target0/lun0: p1 Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0 The new device in /proc/bus/usb/devices is the same as that for coldplugging in 2.6.10, except with Dev# = 6, and Driver=usb-storage. Here are the equivalent logs for the Jumpdrive: dmesg for 2.6.10: usb 4-3: new high speed USB device using ehci_hcd and address 3 ub: sizeof ub_scsi_cmd 64 ub_dev 2472 uba: device 3 capacity nsec 248928 bsize 512 uba: device 3 capacity nsec 248928 bsize 512 /dev/ub/a: p1 usbcore: registered new driver ub dmesg for 2.6.9: usb 4-3: new high speed USB device using address 3 scsi1 : SCSI emulation for USB Mass Storage devices Vendor: LEXAR Model: JUMPDRIVE SPORT Rev: 2000 Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 248928 512-byte hdwr sectors (127 MB) sda: assuming Write Enabled sda: assuming drive cache: write through /dev/scsi/host1/bus0/target0/lun0: p1 Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0 USB Mass Storage device found at 3 Entry in /proc/bus/usb/devices for 2.6.9: T: Bus=04 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 3 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=05dc ProdID=a400 Rev=20.00 S: Manufacturer=LEXAR MEDIA S: Product=JUMPDRIVE SPORT S: SerialNumber=33000001217000003478 C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=31875us (2.6.10 entry for Jumpdrive differs only in that "Driver=ub"). These are fresh kernel.org kernels running on a Thinkpad X40; my full setup (including 2.6.10 kernel config) is described here: http://www.dynevor.org/linuxiste/10p1/x40_mandrake_10p1.html I have tried the suggestions in http://article.gmane.org/gmane.linux.usb.user/11426: there does not seem to be anything attached to /proc/bus/usb, from the lsof output, and nothing new came up using the "usbfs_snoop=y" option to usbcore. Is there anything more I can try to help debug this problem? Thanks a lot, Matthew ------------------------------------------------- dmesg output with verbose USB debugging in 2.6.10 ------------------------------------------------- hub 4-0:1.0: state 5 ports 6 chg ffc0 evt 0008 ehci_hcd 0000:00:1d.7: GetStatus port 3 status 001803 POWER sig=j CSC CONNECT hub 4-0:1.0: port 3, status 0501, change 0001, 480 Mb/s hub 4-0:1.0: debounce: port 3: total 100ms stable 100ms status 0x501 ehci_hcd 0000:00:1d.7: port 3 high speed ehci_hcd 0000:00:1d.7: GetStatus port 3 status 001005 POWER sig=se0 PE CONNECT usb 4-3: new high speed USB device using ehci_hcd and address 2 ehci_hcd 0000:00:1d.7: devpath 3 ep0in 3strikes ehci_hcd 0000:00:1d.7: port 3 full speed --> companion ehci_hcd 0000:00:1d.7: GetStatus port 3 status 003801 POWER OWNER sig=j CONNECT uhci_hcd 0000:00:1d.1: wakeup_hc hub 2-0:1.0: state 5 ports 2 chg fffc evt 0002 uhci_hcd 0000:00:1d.1: port 1 portsc 0083,00 hub 2-0:1.0: port 1, status 0101, change 0001, 12 Mb/s hub 2-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101 usb 2-1: new full speed USB device using uhci_hcd and address 2 uhci_hcd 0000:00:1d.1: uhci_result_control: failed with status 440000 [f7b2c240] link (37b2c1b2) element (37d15040) 0: [f7d15040] link (37d15080) e0 Stalled CRC/Timeo Length=7 MaxLen=7 DT0 EndPt=0 Dev=0, PID=2d(SETUP) (buf=3670e3a0) 1: [f7d15080] link (37d150c0) e3 SPD Active Length=0 MaxLen=3f DT1 EndPt=0 Dev=0, PID=69(IN) (buf=344a2b80) 2: [f7d150c0] link (00000001) e3 IOC Active Length=0 MaxLen=7ff DT1 EndPt=0 Dev=0, PID=e1(OUT) (buf=00000000) usb 2-1: device descriptor read/64, error -71 uhci_hcd 0000:00:1d.1: uhci_result_control: failed with status 440000 [f7b2c240] link (37b2c1b2) element (37d15040) 0: [f7d15040] link (37d15080) e0 Stalled CRC/Timeo Length=7 MaxLen=7 DT0 EndPt=0 Dev=0, PID=2d(SETUP) (buf=3778fae0) 1: [f7d15080] link (37d150c0) e3 SPD Active Length=0 MaxLen=3f DT1 EndPt=0 Dev=0, PID=69(IN) (buf=344a2b80) 2: [f7d150c0] link (00000001) e3 IOC Active Length=0 MaxLen=7ff DT1 EndPt=0 Dev=0, PID=e1(OUT) (buf=00000000) usb 2-1: device descriptor read/64, error -71 usb 2-1: new full speed USB device using uhci_hcd and address 3 uhci_hcd 0000:00:1d.1: uhci_result_control: failed with status 440000 [f7b2c240] link (37b2c1b2) element (37d15040) 0: [f7d15040] link (37d15080) e0 Stalled CRC/Timeo Length=7 MaxLen=7 DT0 EndPt=0 Dev=0, PID=2d(SETUP) (buf=3670e3a0) 1: [f7d15080] link (37d150c0) e3 SPD Active Length=0 MaxLen=3f DT1 EndPt=0 Dev=0, PID=69(IN) (buf=344a2b80) 2: [f7d150c0] link (00000001) e3 IOC Active Length=0 MaxLen=7ff DT1 EndPt=0 Dev=0, PID=e1(OUT) (buf=00000000) usb 2-1: device descriptor read/64, error -71 uhci_hcd 0000:00:1d.1: uhci_result_control: failed with status 440000 [f7b2c240] link (37b2c1b2) element (37d15040) 0: [f7d15040] link (37d15080) e0 Stalled CRC/Timeo Length=7 MaxLen=7 DT0 EndPt=0 Dev=0, PID=2d(SETUP) (buf=3670e3a0) 1: [f7d15080] link (37d150c0) e3 SPD Active Length=0 MaxLen=3f DT1 EndPt=0 Dev=0, PID=69(IN) (buf=344a2b80) 2: [f7d150c0] link (00000001) e3 IOC Active Length=0 MaxLen=7ff DT1 EndPt=0 Dev=0, PID=e1(OUT) (buf=00000000) usb 2-1: device descriptor read/64, error -71 hub 2-0:1.0: state 5 ports 2 chg fffc evt 0002 ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. 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