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en:arm:tqma28:linux:ptxdist:known_issues [2019/07/30 14:51] – liedmannen:arm:tqma28:linux:ptxdist:known_issues [2020/08/05 12:39] – changed tab template liedmann
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 ~~NOCACHE~~ ~~NOCACHE~~
-<embed en:templates:tabs_new>+<embed en:templates:tabs_ptxdist_bootstrap>
   <label product_type>Embedded module</label>   <label product_type>Embedded module</label>
   <label lang>en</label>   <label lang>en</label>
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   * **Workaround**: Modify the Devicetree. Add/change at** usb@80090000** the following property **"dr_mode" to "dr_mode = host"**   * **Workaround**: Modify the Devicetree. Add/change at** usb@80090000** the following property **"dr_mode" to "dr_mode = host"**
  
-==== Linux boot Kernel panic Unable to mount root fs ==== 
  
-Error message: 
-<code> 
-[    1.090000] VFS: Cannot open root device "mmcblk0p3" or unknown-block(0,0): error -6 
-[    1.100000] Please append a correct "root=" boot option; here are the available partitions: 
-[    1.110000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) 
-[    1.110000] [<c00139f8>] (unwind_backtrace+0x0/0xf0) from [<c02f87fc>] (panic+0x98/0x1f4) 
-[    1.110000] [<c02f87fc>] (panic+0x98/0x1f4) from [<c042cbf4>] (mount_block_root+0x178/0x22c) 
-[    1.110000] [<c042cbf4>] (mount_block_root+0x178/0x22c) from [<c042cd8c>] (mount_root+0xe4/0x10c) 
-[    1.110000] [<c042cd8c>] (mount_root+0xe4/0x10c) from [<c042ced0>] (prepare_namespace+0x11c/0x180) 
-[    1.110000] [<c042ced0>] (prepare_namespace+0x11c/0x180) from [<c042c8b0>] (kernel_init+0x170/0x1ac) 
-[    1.110000] [<c042c8b0>] (kernel_init+0x170/0x1ac) from [<c000f8b4>] (kernel_thread_exit+0x0/0x8) 
-[    1.110000] Rebooting in 1 seconds.. 
-</code> 
- 
-Kernel command line: 
-<code> 
-[    0.000000] Kernel command line: fec_mac=02:00:01:00:00:01 ip=:::::eth0:off root=/dev/mmcblk0p3 ro console=ttyAPP3,115200 lcd_panel=fg0700 ssp1 panic=1 
-</code> 
- 
-U-Boot mmc part lists the partition: 
-<code> 
-TQMa28 U-Boot > mmc part 
- 
-Partition Map for MMC device 0  --   Partition Type: DOS 
- 
-Partition     Start Sector     Num Sectors     Type 
-    1                16384           16384      53 
-    2                32768           16384      83 
-    3                49152         3784704      83 
-</code> 
- 
-Solution: add the ''rootwait'' option to the command line: 
- 
-<code> 
-TQMa28 U-Boot > setenv addmmc 'setenv bootargs $bootargs root=/dev/mmcblk0p3 ro rootwait' 
-</code> 
  • Last modified: 2022/08/04 15:02