This is on a Acer TravelMate 5720 with kernel-2.6.23.14-107.fc8.x86_64 and a Patriot Memory 2GB TF card with included SD adapter. Relevant PCI info: 0f:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD) If a SD card (or in my specific case, a TF card with a SD adapter) is inserted too slowly then the card won't be detected and automounted properly. Either it will not be detected properly, or errors will be reported. Jan 20 08:37:05 localhost kernel: tifm_core: MMC/SD card detected in socket 0:1 Jan 20 08:41:22 localhost kernel: tifm_core: MMC/SD card detected in socket 0:1 Jan 20 08:41:22 localhost kernel: mmc1: new SD card at address 9336 Jan 20 08:41:22 localhost kernel: mmcblk0: mmc1:9336 SD02G 1966080KiB Jan 20 08:41:22 localhost kernel: mmcblk0: p1 Jan 20 08:41:23 localhost kernel: mmcblk0: error 2 transferring data Jan 20 08:41:23 localhost kernel: end_request: I/O error, dev mmcblk0, sector 96 Jan 20 08:41:23 localhost kernel: Buffer I/O error on device mmcblk0, logical block 12 Jan 20 08:41:23 localhost kernel: mmcblk0: error 1 sending read/write command Jan 20 08:41:23 localhost kernel: end_request: I/O error, dev mmcblk0, sector 104 Jan 20 08:41:23 localhost kernel: Buffer I/O error on device mmcblk0, logical block 13 Jan 20 08:41:23 localhost kernel: end_request: I/O error, dev mmcblk0, sector 112 Jan 20 08:41:23 localhost kernel: Buffer I/O error on device mmcblk0, logical block 14 Jan 20 08:41:23 localhost kernel: end_request: I/O error, dev mmcblk0, sector 120 Jan 20 08:41:23 localhost kernel: Buffer I/O error on device mmcblk0, logical block 15 Jan 20 08:41:23 localhost kernel: end_request: I/O error, dev mmcblk0, sector 128 [snip many more errors] If inserted with conviction, the card will be detected and mounted properly. I have not tested with other flash media types in this reader. This indicates to me that somewhere in the tifm stack there's a subtle timing bug.
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