Hi, Under Linux, the most annoying problem that the Lenovo Thinkpad Tablet 10 has is the unreliable eMMC. I intermittently get an error "mmc0: Timeout waiting for hardware interrupt" followed by a crash of the machine (when the eMMC is used as rootfs). I have been able to work around this issue with kernel 3.13.0 by passing the debug_quirks2=0xc0 option to the sdhci module, which disables the HS200 and DDR50 transfer modes. The read data rate (as measured by hdparm -t) drops from 119MB/s to 42MB/s, but at least the computer no longer crashes every 20 minutes and my files are not corrupted anymore. Unfortunately, with more recent kernels such as 3.18.4, the sdhci module (still with debug_quirks2=0xc0) appears to select another problematic transfer mode. The read data rate jumps to 65MB/s and the bug manifests itself again. What changes in sdhci between 3.13.0 and 3.18.4 could cause that? I'd like to be able to use the eMMC reliably at least at 42MB/s using recent kernels, which hopefully will introduce fixes for the gazillion other problems that this crippled machine has under Linux (absolutely nothing works correctly except the CPU, display and USB). Thanks, Sébastien -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
