On Thu, 22 Mar 2012, Pham Ngoc Hai wrote: > Hi Alan, the Samsung android system does not provice lsusb. > I can use the hub and the mouse on my laptop (Debian x86) without any problem Can you post a usbmon log showing what happens when you plug the hub and mouse into the laptop? > This is after I connect the OTG cable and then the Powered hub to the OTG cable: > cat /sys/kernel/debug/usb/devices > > T:� Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=� 1 Spd=480 MxCh= 1 > B:� Alloc=� 0/800 us ( 0%), #Int=� 1, #Iso=� 0 > D:� Ver= 2.00 Cls=09(hub� ) Sub=00 Prot=00 MxPS=64 #Cfgs=� 1 > P:� Vendor=1d6b ProdID=0002 Rev= 2.06 > S:� Manufacturer=Linux 2.6.35.7postea-01045-g551a073-dirty EMSP_OTGHCD > S:� Product=S3C OTGHCD > S:� SerialNumber=s3cotg > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=� 0mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub� ) Sub=00 Prot=00 Driver=hub > E:� Ad=81(I) Atr=03(Int.) MxPS=�� 4 Ivl=256ms > > T:� Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=� 2 Spd=480 MxCh= 4 > D:� Ver= 2.00 Cls=09(hub� ) Sub=00 Prot=01 MxPS=64 #Cfgs=� 1 > P:� Vendor=05e3 ProdID=0608 Rev= 9.01 > S:� Product=USB2.0 Hub > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub� ) Sub=00 Prot=00 Driver=hub > E:� Ad=81(I) Atr=03(Int.) MxPS=�� 1 Ivl=256ms The hub's descriptors look right. This means there's probably something wrong with the host controller driver. This "S3C OTGHCD" driver isn't in the regular kernel; the Android people must have added it. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
