[bug #64090] at_keyboard hangs HP EliteBooks with GRUB on Coreboot

[Riku Viitanen]

URL:
  <https://savannah.gnu.org/bugs/?64090>

                 Summary: at_keyboard hangs HP EliteBooks with GRUB on
Coreboot
                   Group: GNU GRUB
               Submitter: riku_v
               Submitted: Sat 22 Apr 2023 12:44:00 PM UTC
                Category: Booting
                Severity: Major
                Priority: 5 - Normal
              Item Group: Hardware-specific
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Riku Viitanen
        Originator Email: riku.viitanen@protonmail.com
             Open/Closed: Open
                 Release: other
                 Release: 
         Discussion Lock: Any
         Reproducibility: Every Time
         Planned Release: None


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Follow-up Comments:


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Date: Sat 22 Apr 2023 12:44:00 PM UTC By: Riku Viitanen <riku_v>
This has been happening for over 5 years:
https://ticket.coreboot.org/issues/141

On EliteBooks with Coreboot+GRUB, GRUB hangs infinitely on the menu screen.
When using Coreboot+SeaBIOS to load GRUB from an MBR hard drive, GRUB works
fine.

I fixed this by implementing a 200 ms timeout in
keyboard_controller_wait_until_ready. This patch is now automatically applied
in Libreboot. Keyboard works correctly now, and GRUB no longer hangs.






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File Attachments:


-------------------------------------------------------
Date: Sat 22 Apr 2023 12:44:00 PM UTC  Name: 0005-at-keyboard-timeout.patch 
Size: 1KiB   By: riku_v

<http://savannah.gnu.org/bugs/download.php?file_id=54652>

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  <https://savannah.gnu.org/bugs/?64090>

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