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Fox: Serial console not working in GRUB + kernel #223

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opened 2026-01-21 13:14:00 +01:00 by rarias · 1 comment
rarias commented 2026-01-21 13:14:00 +01:00
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For some reason, the AMD platform uses the ttyS1 instead of ttyS0 at 115200 baudrate. However, it doesn't seem to even work with those settings. As soon as the BIOS enters the GRUB, the console redirection breaks.

I can manually make it work after booting linux and then using sudo picocom -b 115200 /dev/ttyS1.

This makes it really hard to test other entries in the grub menu. We should fix it first.

For some reason, the AMD platform uses the ttyS1 instead of ttyS0 at 115200 baudrate. However, it doesn't seem to even work with those settings. As soon as the BIOS enters the GRUB, the console redirection breaks. I can manually make it work after booting linux and then using `sudo picocom -b 115200 /dev/ttyS1`. This makes it really hard to test other entries in the grub menu. We should fix it first.
rarias added the configkernelbug labels 2026-01-21 13:14:00 +01:00
rarias commented 2026-01-21 13:36:56 +01:00
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Hmm, could this be the BMC failing just before GRUB starts? Now is currently broken:

fox# ipmitool power status
No data available
Get Device ID command failed
No data available
No data available
No valid response received
No data available
Unable to get Chassis Power Status

However it replies to ping. Maybe through the web console we can get a virtual pty working.

Hmm, could this be the BMC failing just before GRUB starts? Now is currently broken: ``` fox# ipmitool power status No data available Get Device ID command failed No data available No data available No valid response received No data available Unable to get Chassis Power Status ``` However it replies to ping. Maybe through the web console we can get a virtual pty working.
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Reference: rarias/jungle#223
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