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Why can't / doesn't U-boot log messages for us to view later


Why is GRUB 2 booting so slowly?u-boot doesn't detect my Ethernet over USB interface (no tftp request)RS-232 to USB CDC_ACM on Debian / BeagleBone Black not workingFailing to Enable UARTs on Beaglebone BlackRepair uEnv.txt from U-Boot terminal?Does the bootloader load the kernel fully into memoryU-boot messages regarding partition switches not understood






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I have a problem whereby a remote BeagleBone device is taking hours to boot up. When it does, I don't see any problems in the kernel boot logs such as journalctl -b or journalctl -b -1



Without having physical access to the device over the serial interface, we can't see what is happening in the bootloader. Why is it that the U-Boot bootloader logs are not saved to somewhere on the flash memory or even RAM, or somewhere readable from when the kernel takes over? This would be extremely useful.



I understand that the file system is not mounted at that point, but surely there could be a solution? Or am I missing something that makes this procedure very difficult?










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    0















    I have a problem whereby a remote BeagleBone device is taking hours to boot up. When it does, I don't see any problems in the kernel boot logs such as journalctl -b or journalctl -b -1



    Without having physical access to the device over the serial interface, we can't see what is happening in the bootloader. Why is it that the U-Boot bootloader logs are not saved to somewhere on the flash memory or even RAM, or somewhere readable from when the kernel takes over? This would be extremely useful.



    I understand that the file system is not mounted at that point, but surely there could be a solution? Or am I missing something that makes this procedure very difficult?










    share|improve this question



























      0












      0








      0








      I have a problem whereby a remote BeagleBone device is taking hours to boot up. When it does, I don't see any problems in the kernel boot logs such as journalctl -b or journalctl -b -1



      Without having physical access to the device over the serial interface, we can't see what is happening in the bootloader. Why is it that the U-Boot bootloader logs are not saved to somewhere on the flash memory or even RAM, or somewhere readable from when the kernel takes over? This would be extremely useful.



      I understand that the file system is not mounted at that point, but surely there could be a solution? Or am I missing something that makes this procedure very difficult?










      share|improve this question














      I have a problem whereby a remote BeagleBone device is taking hours to boot up. When it does, I don't see any problems in the kernel boot logs such as journalctl -b or journalctl -b -1



      Without having physical access to the device over the serial interface, we can't see what is happening in the bootloader. Why is it that the U-Boot bootloader logs are not saved to somewhere on the flash memory or even RAM, or somewhere readable from when the kernel takes over? This would be extremely useful.



      I understand that the file system is not mounted at that point, but surely there could be a solution? Or am I missing something that makes this procedure very difficult?







      mount logs boot-loader u-boot beagleboneblack






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 2 days ago









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