Hi All, Is there any support for split transactions ( ISOCH IN ) in linux kernel ?. I am using linux-2.6.27 and connected USB full speed camera (Logitech QuickCam Pro 3000) under a high speed hub. The camera is detected by PWC driver & when I tried to open the application (IP Telephony), it is not capturing the video. Where as If I connect the device directly to ohci roothub, the application is successfully capturing the video. Can anybody help regarding this. Thanks in Advance.... Regards, Naveen See the dumps DMESG OUTPUT usb 1-1: new high speed USB device using ehci_hcd and address 3 PM: Adding info for usb:1-1 PM: Adding info for No Bus:usbdev1.3_ep00 usb 1-1: configuration #1 chosen from 1 choice PM: Adding info for usb:1-1:1.0 hub 1-1:1.0: USB hub found hub 1-1:1.0: 4 ports detected PM: Adding info for No Bus:usbdev1.3_ep81 usb 1-1.1: new full speed USB device using ehci_hcd and address 4 PM: Adding info for usb:1-1.1 PM: Adding info for No Bus:usbdev1.4_ep00 usb 1-1.1: configuration #1 chosen from 1 choice PM: Adding info for usb:1-1.1:1.0 pwc: Logitech QuickCam Pro 3000 USB webcam detected. pwc: Registered as /dev/video0. PM: Adding info for No Bus:usbdev1.4_ep82 PM: Adding info for No Bus:usbdev1.4_ep85 PM: Adding info for usb:1-1.1:1.1 PM: Adding info for usb:1-1.1:1.2 PM: Adding info for No Bus:usbdev1.4_ep84 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 pwc: Failed to set video mode QSIF@10 fps; return code = -32 /proc/bus/usb/devices output T: Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.19 uhci_hcd S: Product=UHCI Host Controller S: SerialNumber=0000:00:1d.3 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= 2 Ivl=255ms T: Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.19 uhci_hcd S: Product=UHCI Host Controller S: SerialNumber=0000:00:1d.2 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= 2 Ivl=255ms T: Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.19 uhci_hcd S: Product=UHCI Host Controller S: SerialNumber=0000:00:1d.1 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= 2 Ivl=255ms T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.19 uhci_hcd S: Product=UHCI Host Controller S: SerialNumber=0000:00:1d.0 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= 2 Ivl=255ms T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 8 B: Alloc= 0/800 us ( 0%), #Int= 1, #Iso= 0 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.19 ehci_hcd S: Product=EHCI Host Controller S: SerialNumber=0000:00:1d.7 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= 2 Ivl=256ms T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 3 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= 7.02 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 T: Bus=01 Lev=02 Prnt=03 Port=00 Cnt=01 Dev#= 4 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=046d ProdID=08b0 Rev= 0.02 S: SerialNumber=01402100A5000000 C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 0 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 196 Ivl=1ms I: If#= 0 Alt= 2 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 292 Ivl=1ms I: If#= 0 Alt= 3 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 448 Ivl=1ms I: If#= 0 Alt= 4 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 592 Ivl=1ms I: If#= 0 Alt= 5 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 704 Ivl=1ms I: If#= 0 Alt= 6 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 776 Ivl=1ms I: If#= 0 Alt= 7 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 840 Ivl=1ms I: If#= 0 Alt= 8 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 896 Ivl=1ms I: If#= 0 Alt= 9 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms I: If#= 0 Alt=10 #EPs= 2 Cls=0a(data ) Sub=ff Prot=00 Driver=Philips webcam E: Ad=82(I) Atr=03(Int.) MxPS= 1 Ivl=100ms E: Ad=85(I) Atr=01(Isoc) MxPS= 960 Ivl=1ms I: If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio I: If#= 2 Alt= 0 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio E: Ad=84(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio E: Ad=84(I) Atr=01(Isoc) MxPS= 90 Ivl=1ms I: If#= 2 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio E: Ad=84(I) Atr=01(Isoc) MxPS= 46 Ivl=1ms I: If#= 2 Alt= 3 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio E: Ad=84(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 2 Alt= 4 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio E: Ad=84(I) Atr=01(Isoc) MxPS= 16 Ivl=1ms The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. 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