Just glancing over your output there it seems perhaps your kernel is expecting a few modules to be compiled into the kernel statically.
On Tue, Sep 9, 2014 at 3:00 AM, William Hermans <yyrk...@gmail.com> wrote: > > http://www.embeddedhobbyist.com/debian-tips/beaglebone-black/beaglebone-black-usb-boot/ > > As far as I know this wont work with an initrd, but i could be remembering > wrongly. Also, the example I give, was based on the idea that this was not > possible with an zImage file. I believe this is no longer the case. > > On Tue, Sep 9, 2014 at 2:15 AM, Alexander Hayman <misterhay...@gmail.com> > wrote: > >> I'm trying to boot from a USB flash drive. I essentially copy the u-boot >> commands for booting from the SD card. I'm running into a problem once the >> kernel has loaded: >> >> Begin: Mounting root file system ... Begin: Running /scripts/local-top >> ... done. >> Begin: Waiting for root file system ... done. >> Gave up waiting for root device. Common problems: >> - Boot args (cat /proc/cmdline) >> - Check rootdelay= (did the system wait long enough?) >> - Check root= (did the system wait for the right device?) >> - Missing modules (cat /proc/modules; ls /dev) >> ALERT! /dev/sda1 does not exist. Dropping to a shell! >> modprobe: module i8042 not found in modules.dep >> modprobe: module ehci-hcd not found in modules.dep >> modprobe: module uhci-hcd not found in modules.dep >> modprobe: module ohci-hcd not found in modules.dep >> >> I plugged in /dev/sda1 as a place holder, but I can't find any indication >> that the initramfs was able to detect a USB flash drive. For some reason >> it complains about ehci-hcd and ohci-hcd modules not being found. The >> stock kernel is able to mount flash drives without any issues using the >> builtin usb-storage and musb-hdrc modules. >> >> [ 1.617727] Initializing USB Mass Storage driver... >> [ 1.625471] usbcore: registered new interface driver usb-storage >> [ 1.634288] USB Mass Storage support registered. >> [ 1.641729] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host) >> >> I'd really appreciate any advice on how to detect and mount the flash >> drive. Do I need to make a modification to initrd? Or do I need to >> rebuild the kernel with the ehci-hcd / ohci-hcd modules? Why isn't it >> detecting the eMMC? >> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to beagleboard+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
