raspberry pi 4b armv8 cannot boot with new mainline kernel

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raspberry pi 4b armv8 cannot boot with new mainline kernel

Postby spirit » Sat Mar 13, 2021 3:02 am

Hi, guys! I'm using raspberry pi 4b with USB boot (viewtopic.php?f=67&t=14756).
But cannot boot since an update, I found the issue is about the linux-aarch64 package, but after several month this issue is not fixed, so I still use linux-aarch64 5.8.9-2, the lastest version is 5.11.4-1.
I want to find the reason, or somebody can tell me how to enable serial debugging, I tried to add $this->bbcode_second_pass_code('', 'enable_uart=1') but there is no log in consloe print output.
spirit
 
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Re: raspberry pi 4b armv8 cannot boot with new mainline kern

Postby solskogen » Sat Mar 13, 2021 10:42 am

I have the same issue on Pi400.
Better use the linux-raspberrypi4 kernel instead.
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Re: raspberry pi 4b armv8 cannot boot with new mainline kern

Postby Kabbone » Sat Mar 13, 2021 12:46 pm

I don't experience these problems with mainline on my pi 4 (4GB)
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Re: raspberry pi 4b armv8 cannot boot with new mainline kern

Postby spirit » Sun Mar 14, 2021 1:25 am

Thank you! I solved this issue with the information you provided. Just reinstall all packages! :lol:
$this->bbcode_second_pass_code('', 'sudo pacman -Sy $(pacman -Qnq)')
I just have another question: How to enable uart?
spirit
 
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Re: raspberry pi 4b armv8 cannot boot with new mainline kern

Postby Kabbone » Sun Mar 14, 2021 7:30 am

Where did you add "enable_uart=1"? How does your boot.txt look like?
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Re: raspberry pi 4b armv8 cannot boot with new mainline kern

Postby spirit » Sun Mar 14, 2021 9:56 am

$this->bbcode_second_pass_quote('', 'W')here did you add "enable_uart=1"? How does your boot.txt look like?

I add "enable_uart=1" in /boot/config.txt, which looks like this: $this->bbcode_second_pass_code('', 'enable_uart=1') I follow the steps on my notebook:
    modprobe ch341

    dir /dev | grep 'tty' #the CH341 device is /dev/ttyUSB0

    stty -F /dev/ttyUSB0 115200

    chmod 666 /dev/ttyUSB0

    screen /dev/ttyUSB0 115200
But it seems not working, there is no log in my terminal output print.
spirit
 
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