Hi Guys, i have a zotac vd01 nano pc that has contains 2 USB 3.0 ports. The problem is that i just cant use those ports without my system hanging. If i try to copy anything to any of my external 3.0 USB disks , the copy starts just fine but after a while the whole system starts to slow down until the point where i can only reboot the system to make it usable again. I just upgraded to linux 3.9.7 vanilla to make it sure this problem was still there. (USB3 debug is enabled) # uname -a Linux zotac 3.9.7-amd64 #1 SMP Sat Jun 22 06:58:00 BRT 2013 x86_64 GNU/Linux when the system starts to slow down i get these messages in /var/log/messages Jun 22 09:51:29 zotac kernel: [ 823.868584] 00 00 00 6b c2 00 00 f0 00 Jun 22 09:51:46 zotac kernel: [ 840.949096] 00 00 01 6d a2 00 00 f0 00 Jun 22 09:52:02 zotac kernel: [ 857.699591] 00 00 02 1f 82 00 00 f0 00 and in /var/log/syslog i get lots of : Jun 22 09:38:00 zotac kernel: [ 11.540175] usb-storage: Attempting to get CSW... Jun 22 09:38:00 zotac kernel: [ 11.540182] usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes Jun 22 09:38:00 zotac kernel: [ 11.540242] usb-storage: Status code 0; transferred 13/13 Jun 22 09:38:00 zotac kernel: [ 11.540248] usb-storage: -- transfer complete Jun 22 09:38:00 zotac kernel: [ 11.540253] usb-storage: Bulk status result = 0 Jun 22 09:38:00 zotac kernel: [ 11.540261] usb-storage: Bulk Status S 0x53425355 T 0x1c8 R 0 Stat 0x0 Jun 22 09:38:00 zotac kernel: [ 11.540269] usb-storage: scsi cmd done, result=0x0 Jun 22 09:38:00 zotac kernel: [ 11.540278] usb-storage: *** thread sleeping. Jun 22 09:38:00 zotac kernel: [ 11.540338] usb-storage: queuecommand_lck called Jun 22 09:38:00 zotac kernel: [ 11.540353] usb-storage: *** thread awakened. Jun 22 09:38:00 zotac kernel: [ 11.540361] usb-storage: Command READ_10 (10 bytes) Jun 22 09:38:00 zotac kernel: [ 11.540366] usb-storage: 28 00 00 00 03 a8 00 00 08 00 Jun 22 09:38:00 zotac kernel: [ 11.540394] usb-storage: Bulk Command S 0x43425355 T 0x1c9 L 4096 F 128 Trg 0 LUN 1 CL 10 Jun 22 09:38:00 zotac kernel: [ 11.540401] usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes Jun 22 09:38:00 zotac kernel: [ 11.540492] usb-storage: Status code 0; transferred 31/31 Jun 22 09:38:00 zotac kernel: [ 11.540497] usb-storage: -- transfer complete Jun 22 09:38:00 zotac kernel: [ 11.540502] usb-storage: Bulk command transfer result=0 Jun 22 09:38:00 zotac kernel: [ 11.540510] usb-storage: usb_stor_bulk_transfer_sglist: xfer 4096 bytes, 1 entries ... ... ... Jun 22 09:54:26 zotac kernel: [ 1001.092488] usb-storage: Bulk data transfer result 0x0 Jun 22 09:54:26 zotac kernel: [ 1001.092493] usb-storage: Attempting to get CSW... Jun 22 09:54:26 zotac kernel: [ 1001.092498] usb-storage: usb_stor_bulk_transfer_buf: xfer 13 bytes Jun 22 09:54:26 zotac kernel: [ 1001.113936] usb-storage: Status code 0; transferred 13/13 Jun 22 09:54:26 zotac kernel: [ 1001.113942] usb-storage: -- transfer complete Jun 22 09:54:26 zotac kernel: [ 1001.113948] usb-storage: Bulk status result = 0 Jun 22 09:54:26 zotac kernel: [ 1001.113954] usb-storage: Bulk Status S 0x53425355 T 0x1671 R 0 Stat 0x0 Jun 22 09:54:26 zotac kernel: [ 1001.113960] usb-storage: scsi cmd done, result=0x0 Jun 22 09:54:26 zotac kernel: [ 1001.113969] usb-storage: *** thread sleeping. Jun 22 09:54:26 zotac kernel: [ 1001.114020] usb-storage: queuecommand_lck called Jun 22 09:54:26 zotac kernel: [ 1001.114043] usb-storage: *** thread awakened. Jun 22 09:54:26 zotac kernel: [ 1001.114049] usb-storage: Command WRITE_10 (10 bytes) Jun 22 09:54:26 zotac kernel: [ 1001.114054] usb-storage: 2a 00 00 09 58 02 00 00 f0 00 Jun 22 09:54:26 zotac kernel: [ 1001.114079] usb-storage: Bulk Command S 0x43425355 T 0x1672 L 122880 F 0 Trg 0 LUN 0 CL 10 Jun 22 09:54:26 zotac kernel: [ 1001.114085] usb-storage: usb_stor_bulk_transfer_buf: xfer 31 bytes Jun 22 09:54:26 zotac kernel: [ 1001.114115] usb-storage: Status code 0; transferred 31/31 Jun 22 09:54:26 zotac kernel: [ 1001.114120] usb-storage: -- transfer complete Jun 22 09:54:26 zotac kernel: [ 1001.114125] usb-storage: Bulk command transfer result=0 Jun 22 09:54:26 zotac kernel: [ 1001.114131] usb-storage: usb_stor_bulk_transfer_sglist: xfer 122880 bytes, 2 entries # lsusb output Bus 004 Device 003: ID 0cf3:3000 Atheros Communications, Inc. AR3011 Bluetooth (no firmware) Bus 005 Device 002: ID 1a40:0201 Terminus Technology Inc. FE 2.1 7-port Hub Bus 005 Device 003: ID 152d:2339 JMicron Technology Corp. / JMicron USA Technology Corp. JM20339 SATA Bridge Bus 006 Device 002: ID 2109:0811 Bus 007 Device 002: ID 0bc2:2332 Seagate RSS LLC Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub # lspci output 00:00.0 Host bridge: VIA Technologies, Inc. VX900 Host Bridge: Host Control (rev 80) 00:00.1 Host bridge: VIA Technologies, Inc. VX900 Error Reporting 00:00.2 Host bridge: VIA Technologies, Inc. VX900 CPU Bus Controller 00:00.3 Host bridge: VIA Technologies, Inc. VX900 DRAM Bus Control 00:00.4 Host bridge: VIA Technologies, Inc. VX900 Power Management and Chip Testing Control 00:00.5 Host bridge: VIA Technologies, Inc. VX900 APIC and Central Traffic Control 00:00.6 Host bridge: VIA Technologies, Inc. VX900 Scratch Registers 00:00.7 Host bridge: VIA Technologies, Inc. VX900 North-South Module Interface Control 00:01.0 VGA compatible controller: VIA Technologies, Inc. VX900 Graphics [Chrome9 HD] 00:01.1 Audio device: VIA Technologies, Inc. Device 9170 00:03.0 PCI bridge: VIA Technologies, Inc. Device a410 00:03.1 PCI bridge: VIA Technologies, Inc. Device b410 00:03.2 PCI bridge: VIA Technologies, Inc. Device c410 00:03.3 PCI bridge: VIA Technologies, Inc. Device d410 00:03.4 Host bridge: VIA Technologies, Inc. Device e410 00:0b.0 Network controller: VIA Technologies, Inc. VX855/VX875 USB Device Controller (rev 10) 00:0f.0 IDE interface: VIA Technologies, Inc. VX900 Serial ATA Controller 00:10.0 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) 00:10.1 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) 00:10.2 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) 00:10.3 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev a0) 00:10.4 USB controller: VIA Technologies, Inc. USB 2.0 (rev 90) 00:11.0 ISA bridge: VIA Technologies, Inc. VX900 Bus Control and Power Management 00:11.7 Host bridge: VIA Technologies, Inc. VX8xx South-North Module Interface Control 00:13.0 PCI bridge: VIA Technologies, Inc. VX855/VX875/VX900 PCI to PCI Bridge 00:14.0 Audio device: VIA Technologies, Inc. VT8237A/VT8251 HDA Controller (rev 20) 02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01) 03:00.0 Ethernet controller: VIA Technologies, Inc. VT6120/VT6121/VT6122 Gigabit Ethernet Adapter (rev 82) 04:00.0 USB controller: VIA Technologies, Inc. Device 3432 (rev 02) Is there any other information i can provide to fix this problem ? []'s Salatiel -- 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