Probably your bootargs passed from uboot override it?? Check in your kernel bootup log, what exactly the bootargs that kernel receives.. (will be shown as "Kernel command line: xxxxxxxxx" -Deva
PS. My sample log., Starting kernel ... Uncompressing Linux......................................................................................................................................................................... done, booting the kernel. Linux version 2.6.32.9 (d...@ubuntu) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #1 SMP PREEMPT Sat Jul 10 00:53:57 IST 2010 CPU: ARMv7 Processor [410fc091] revision 1 (ARMv7), cr=10c53c7f CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache Machine: OMAP4430 4430SDP board Memory policy: ECC disabled, Data cache writealloc OMAP4430 ES1.0 SRAM: Mapped pa 0x40300000 to va 0xfe400000 size: 0x100000 Reserving 14745600 bytes SDRAM for VRAM PERCPU: Embedded 8 pages/cpu @c17a4000 s10080 r8192 d14496 u65536 pcpu-alloc: s10080 r8192 d14496 u65536 alloc=16*4096 pcpu-alloc: [0] 0 [0] 1 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 117602 *Kernel command line: console=ttyO2,115200n8 root=/dev/mmcblk0p2 rw mem=463M init=/init omapfb.vram=0:4M androidboot.console=ttyO2* PID hash table entries: 2048 (order: 1, 8192 bytes) Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) On Mon, Jul 12, 2010 at 2:23 PM, yenchengwang <yenchengw...@gmail.com>wrote: > hi all, > I always get the error message below while kernel booting~ > CONFIG_CMDLINE="console=ttyS0, 115200 mem=128M uard_dma android" > > VFS: Cannot open root device "<NULL>" or unknown-block(0,0) > please append a correct "root=" boot option; here are the available > partitions: > 1f00 1024 mtdblock0 (driver?) > 1f01 3072 mtdblock1 (driver?) > 1f02 65536 mtdblock2 (driver?) > 1f03 177536 mtdblock3 (driver?) > .... > 1f07 512 mtdblock7 (driver?) > kernel panic - not syncing: VFS: Unable to mount root fs on > unknown-block(0, 0) > > I also tried > CONFIG_CMDLINE="root=/dev/mtdblock2 rw init=/init console=ttyS0, 115200 > mem=128M uard_dma android" > VFS: Cannot open root device "mtdblock2" or unknown-block(31,2) > please append a correct "root=" boot option; here are the available > partitions: > 1f00 1024 mtdblock0 (driver?) > 1f01 3072 mtdblock1 (driver?) > 1f02 65536 mtdblock2 (driver?) > 1f03 177536 mtdblock3 (driver?) > .... > 1f07 512 mtdblock7 (driver?) > kernel panic - not syncing: VFS: Unable to mount root fs on > unknown-block(31, 2) > > need some advance~~thanks !! > > -- > Regards > Y-C Wang > > -- > unsubscribe: > android-porting+unsubscr...@googlegroups.com<android-porting%2bunsubscr...@googlegroups.com> > website: http://groups.google.com/group/android-porting > -- unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting
