Arch Linux

Connected on USB3 SSD as root partition, sometimes the system lags a lot and I'm not able to stop the system properly as the FS become readonly. Tested with 4.2 kernel. With testing version (4.3), the lags occur again but after few minutes it come back to a stable situation. Here is the copy of journalctl :

déc. 09 22:39:07 Vulpus kernel: xhci_hcd 0000:00:14.0: ERROR Unknown event condition 10, HC probably busted
déc. 09 22:39:07 Vulpus kernel: xhci_hcd 0000:00:14.0: ERROR Transfer event for disabled endpoint or incorrect
déc. 09 22:39:07 Vulpus kernel: xhci_hcd 0000:00:14.0: @0000000214c8feb0 00000000 00000000 04000000 04088000
déc. 09 22:39:34 Vulpus wpa_supplicant[348]: wlp2s0: WPA: Group rekeying completed with f4:ca:e5:b7:84:14 [GTK=
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#0 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#0 CDB: opcode=0x2a 2a 00 00 2d 76 90 00 00 08 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#11 uas_eh_abort_handler 0 uas-tag 12 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#11 CDB: opcode=0x2a 2a 00 00 2d 76 50 00 00 08 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#10 uas_eh_abort_handler 0 uas-tag 11 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#10 CDB: opcode=0x2a 2a 00 00 2d 75 c0 00 00 08 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#9 uas_eh_abort_handler 0 uas-tag 10 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#9 CDB: opcode=0x2a 2a 00 00 2d 75 28 00 00 08 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#8 uas_eh_abort_handler 0 uas-tag 9 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#8 CDB: opcode=0x2a 2a 00 00 2d 75 08 00 00 08 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#7 uas_eh_abort_handler 0 uas-tag 8 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#7 CDB: opcode=0x2a 2a 00 00 2d 74 c0 00 00 08 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#6 uas_eh_abort_handler 0 uas-tag 7 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#6 CDB: opcode=0x2a 2a 00 00 2d 72 40 00 00 10 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#5 uas_eh_abort_handler 0 uas-tag 6 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#5 CDB: opcode=0x2a 2a 00 00 2d 72 10 00 00 10 00
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#4 uas_eh_abort_handler 0 uas-tag 5 inflight: CMD OUT
déc. 09 22:39:37 Vulpus kernel: sd 4:0:0:0: [sdb] tag#4 CDB: opcode=0x2a 2a 00 00 2d 71 f8 00 00 08 00

This bug have been already report on this thread :

http://www.spinics.net/lists/linux-usb/msg129078.html