39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
# Troubleshouting Boot Issues
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## SecureBoot
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While having secure boot enabled it is not possible to load the yfs kernel module. Therefore it is important that secure boot is disabled on the systems booting EFI!
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This is how to check on a running system if secure boot is enabled:
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```bash
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mokutil --sb-state
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```
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https://access.redhat.com/articles/5337691
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## Redirect Serial Output to File in VMware
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To change the serial port settings the VM needs to be shut down. Then edit the VM settings and add a new serial device by clicking "ADD NEW DEVICE" on top right and there select "Serial Port".
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The serial port should then be connected to a file on the datastore `serial_console`:
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These files then can be accessed over `lxsup00.psi.ch:/data/serial_console`.
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## Send Grub Output to Serial Port
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For sending out Grub debug information over the serial port to a file because it is to much to fit the screen or for later inspection, you might do the following:
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- in the Grub menue type `c` to get to the command line
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- configure the serial port with
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```
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serial --unit=0 --speed=115200
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```
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- set the output to the serial port, run the debug command and set the output back:
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```
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terminal_output serial; lsefi; terminal_output console
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```
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