[Gutsy] : SD card readers fail, all kinds.

Bug #185955 reported by Swâmi Petaramesh on 2008-01-25
Affects Status Importance Assigned to Milestone

Bug Description


I've seen several bug reports about problems with SD cards readers of different kinds, but I'd like to report here that I have encountered trouble with *all* SD cards readers that I've tried to use with Ubuntu Gutsy, on 3 machines :

1/ A desktop system with an externally attached brandless USB 2.0 hub / Multiformat memory card reader (cards are seen as /dev/sd* devices)

2/ An Acer Aspire 3104 WLMi laptop with an integrated ENE SD/MMC card reader (that wasn't seen at all in feisty, and that "appeared" after upgrading to Gutsy) (cards are seen as /dev/mmcblk*)

3/ An Asus EeePC laptop with an integrated SD/MMC card reader that is seen as an UBS 2.0 device and shows its cards as /dev/sdb.

On all these systems :

- SD cards, all types, are recognized at insertion and their contents can be shown, whatever size or speed the card is.

- On all kind of cards, reading and writing *small* amounts of data (up to a few dozens megabytes) at a time, works.

- On all "big" cards ( > 1GB ), reading and copying large amounts of data at a time causes I/O errors and ends in freezing the programs that are accessing the cards.

- The ENE card reader (seen as /dev/mmcblk0p*...) cause various I/O error messages to be spit in syslog. (can't be more precise, I don't have the machine at hand right now)

- The USB 2.0 card readers, either internal or external, usually cause some repetitive USB errors to be logged, such as "reset high speed USB device using ehci_hcd and address blah"

- It seems that the bigger and slower card, the sooner the problem happens, and the smaller and faster card, the later it happens (or not at all).

- I have seen this on more than 6 different cards (different sizes, brands and speeds) and tested all concerned SD cards in other devices (GPS device, digital camera) and also on 2 different Winthing laptops with integrated SD card readers, and the SD cards behave well on all these machines.

So it's obvious to me that trying to use SD cards with Ubuntu Gutsy leads to failures, whatever the SD card reader equipment is, and whatever card is used (but the smaller and faster the better).

Jean-Baptiste Lallement (jibel) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with latest Ubuntu release? Thanks in advance.

Jean-Baptiste Lallement (jibel) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

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