• Status Closed
  • Percent Complete
  • Task Type Bugs
  • Category Drivers
  • Assigned To No-one
  • Operating System Sansa AMSv2
  • Severity Medium
  • Priority Very Low
  • Reported Version Daily build (which?)
  • Due in Version Undecided
  • Due Date Undecided
  • Votes
  • Private
Attached to Project: Rockbox
Opened by sideral - 2011-03-08
Last edited by sideral - 2011-03-21

FS#12001 - Rockbox USB on ClipV2 conflicts with r29169

Enabling Rockbox USB on the ClipV2 (with attached patch 0001) has been very stable for me recently (since r29146, to be exact). I also do not need the hard-reset workaround from  FS#11664 .

But… for reasons I do not understand, r29169 (AMSv2 SD: Fix card insert lockups in USB mode; by jhMikeS) breaks USB for me, and I had to back this change out. Interestingly, the code in question addresses an SD-card issue, but the ClipV2 does not have an SD-card slot.

The symptom is occasional SCSI errors on my Linux host trying to read certain sectors. fsck.vfat fails with an I/O error attempting to read a high-numbered sector (possibly the MBR backup sector).

For the convenience of users who’d like to try Rockbox USB on the ClipV2, the attached patches enable USB (patch 0001) and revert r29169 (patch 0002).

Closed by  sideral
2011-03-21 19:40
Reason for closing:  Fixed
Additional comments about closing:   Warning: Undefined array key "typography" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 371 Warning: Undefined array key "camelcase" in /home/rockbox/flyspray/plugins/dokuwiki/inc/parserutils.php on line 407

Fixed with r29625

MikeS commented on 2011-03-08 23:53

As I mentioned, try increasing the retry counts in the SD driver, most notably wait_for_tran_state. You can easily add retry to the main card as well in the thansfer sectors funtion by just always setting it > 0. The infine loops won’t work in general and should be considered unsafe. You won’t break anything by increasing the counts or allowing the retry on the main sd.

The other option is to make it one way without an external slot and another with it but that’s sort of ugly.

MikeS commented on 2011-03-20 20:30

Is the issue actually fixed now after r29625? That would be nice indeed.

Yes, this appears to fix the issue. Thanks to you and funman!

it works! (with one caveat) I am using a FuzeV2, it works great with my 8gb microsd card; however whenever I turn on rockbox I have to unplug and re-plug in my microsd card for rockbox to recognize it.

I can see/read/write the card in windows 7 though; it is actually faster than it had been (can write at 5 mb/s vs 3mb/s with r29143)

I am only running the first patch (0001) though, since I *thought* that the issue was fixed in r29625, I do not know if that is what is causing the caveat.


Yes, running SVN head with only patch 0001 should give you somewhat reliable USB access to your SD media.

The “caveat” (SD card not recognized on boot) is a separate issue that’s tracked as  FS#11870 .


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