petalinux 2017.4移植操作系统从SD卡启动出错_mmc0: problem switching card into high-speed mode!-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_39337844/article/details/90237477

本文详细记录了一次开机自启遇到的串口打印错误信息，包括找不到声音卡、MMC设备问题、EXT4文件系统挂载失败等。通过分析内核panic原因，指出文件系统权限不足是根本问题，并提供了sudo chmod命令修改ext分区文件权限的解决方案。

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开机自启，串口打印错误信息

No soundcards found.
Waiting for root device /dev/mmcblk0p2...
mmc0: Problem switching card into high-speed mode!
mmc0: new SDHC card at address 0001
mmcblk0: mmc0:0001 SD 7.39 GiB
mmcblk0: p1 p2
EXT4-fs (mmcblk0p2): couldn't mount as ext3 due to feature incompatibilities
EXT4-fs (mmcblk0p2): recovery complete
EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) on device 179:2.
devtmpfs: mounted
Freeing unused kernel memory: 1024K (c0900000 - c0a00000)
request_module: runaway loop modprobe binfmt-0000
Starting init: /sbin/init exists but couldn't execute it (error -8)
request_module: runaway loop modprobe binfmt-0000
Starting init: /bin/sh exists but couldn't execute it (error -8)
Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
CPU0: stopping
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-xilinx-v2017.4 #1
Hardware name: Xilinx Zynq Platform
[<c010e1c4>] (unwind_backtrace) from [<c010a424>] (show_stack+0x10/0x14)
[<c010a424>] (show_stack) from [<c02dc0b0>] (dump_stack+0x80/0x9c)
[<c02dc0b0>] (dump_stack) from [<c010c978>] (ipi_cpu_stop+0x3c/0x70)
[<c010c978>] (ipi_cpu_stop) from [<c010d190>] (handle_IPI+0x64/0x84)
[<c010d190>] (handle_IPI) from [<c0101420>] (gic_handle_irq+0x78/0x94)
[<c0101420>] (gic_handle_irq) from [<c010ae0c>] (__irq_svc+0x6c/0xa8)
Exception stack(0xc0a01f38 to 0xc0a01f80)
1f20: 00000000 00000000
1f40: 2ee97000 ef7d89c0 6a1faaec 00000000 ef7d7e40 00000000 6a0b9693 00000000
1f60: 00000000 00000000 0000000b c0a01f88 c04b1118 c04b113c 60000013 ffffffff
[<c010ae0c>] (__irq_svc) from [<c04b113c>] (cpuidle_enter_state+0xe4/0x1b0)
[<c04b113c>] (cpuidle_enter_state) from [<c014c694>] (cpu_startup_entry+0x17c/0x19c)
[<c014c694>] (cpu_startup_entry) from [<c0900bb4>] (start_kernel+0x2f8/0x358)
---[ end Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.