On Sun, Jul 15, 2012 at 11:14:13 -0400, Alan Stern wrote: ... > In past years I have found that Genesys's devices tend to be rather > buggy. This card reader continues the tradition. Basically, although > the firmware works reasonably well at high speed, the SuperSpeed > support is too buggy to be usable. > > My advice is to exchange the card reader for one of a different brand. I got £6 reader from eBay, sanXi usb3 sdcx reader.. It reset itself to usb2 speed when I tried it in usb3 port and in usb2 port it is quite slow (14 MB/s). There are benchmarks done by other people with sanXi where they get good speed (90 MB/s) but presumably they do not have any ASMedia near their computers. Also, (after first use) the usb3 port I used sanXi in was DEAD till I rebooted the machine; also, other devices were not detected in the port, either. > Alan Stern > > P.S.: Sarah, the lspci information shows this xHCI controller to be an > ASM1042 controller from ASMedia. Is this one of those known to have > the short-packet bug? The usbmon trace shows a cancelled transfer, for > which 0 bytes must have been received, but with actual_length equal to > the transfer_buffer_length. 3.6.0-rc2-g6dab7ede has some funny printk's , but it panics on network use so I am back to 3.5.0-rc7-g84a1caf: <5>[ 5.163846] scsi 10:0:0:0: bad extra_isize (%u != %u)Direct-Access Generic STORAGE DEVICE TS07 PQ: 0 ANSI: 0 <3>[ 2277.412255] sd 10:0:0:1: 6mpf: %llx > This would seem to indicate another type of bug in the host controller. > Apparently it reported normal completion for a transfer that was > cancelled. Can these be worked around in kernel, or is firmware update needed for asmedia? I have latest BIOS from Asus... -- Do what you love because life is too short for anything else. -- 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
