Description of problem: I have some generic USB combo hub + card reader. Under linux, I'm unable to mount any card I tried. According to dmesg output, after I insert a card into reader, kernel periodically resets it. This happens in both F7 latest kernel and in latest rawhide kernel. Version-Release number of selected component (if applicable): kernel-2.6.23.17-82.fc7 kernel-2.6.25-0.101.rc4.git3.fc9 How reproducible: Always. USB log and messages log attached
Created attachment 298162 [details] kernel messages log
Created attachment 298163 [details] usbmon log
This is a very good log, thanks. Unfortunately, I don't know what to do about this. The device works fine at first and reports missing media. Then, just out of the blue, it stops replying to the request to transfer the 13-byte status block (it's the -84: EILSEQ: 3-try token timeout or CRC error). This is a low-level USB protocol violation, which should never happen. After that the device performs all control transations, accepts SCSI commands, but (mostly) fails on getting responses just like before. It's possible that it becomes this way when a card is inserted. Maybe it wants a delay before a status request, I don't know. The longest gap before the failing transfer is 9ms. I would also try a CF card. Maybe the internal firmware gets into a loop when it has to run bit-bang control for serial interface carts. In any case, clearly something is buggy here, we're looking for workarounds.
Actually, it was a CF card. Other cards - SD and M2 - behave the same way.
Just tried it in Ubuntu 7.10 liveCD and it works there(kernel 2.6.22-14-generic). Only getting few I/O errors during large file copy.
Maybe they applied US_FL_GO_SLOW and it worked, who knows. It's a major pain to liberate fixes hidden in Ubuntu.
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