[coreboot - Bug #659] Port of Dell Latitude 7480

Issue #659 has been updated by Gabriel Turlea.


Hi Walter, 
 
  Thank you for your suggestions. I have tried EDK2, and the keyboard issue persists. It is not usable during payload use either Seabios/EDK2 and gives the following error:
  [ERROR]  Keyboard Interface test failed: 0x8

  I suspect it has something to do with the i8042 PS/2 Controller. Here is the difference between OEM:
i8042: PNP: PS/2 Controller [PNP0303:PS2K] at 0x60,0x64 irq 1
i8042: PNP: PS/2 appears to have AUX port disabled, if this is incorrect please boot with i8042.nopnp
i8042: Warning: Keylock active
serio: i8042 KBD port at 0x60,0x64 irq 1
input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
   
    Here is the output of my coreboot port:
i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
i8042: Warning: Keylock active
i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
input: AT Raw Set 2 keyboard as /devices/platform/i8042/serio0/input/input0
input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/input/input3


  On a positive note removing the battery seems to have reduced the input lag, I will keep testing.

All the best,
Gabriel
  

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Bug #659: Port of Dell Latitude 7480
https://ticket.coreboot.org/issues/659#change-2365

* Author: Gabriel Turlea
* Status: New
* Priority: Normal
* Target version: none
* Start date: 2026-07-14
----------------------------------------
I have had success porting coreboot to the Dell Latitude 7480 based on work done by Nicholas Chin. Everything works great except the Keyboard. Once linux boots the keyboard works but has sporatic input/output lags. I am not sure what supporting documentation would help in tracking down the issue.

Thank you

---Files--------------------------------
latitude_7480_cbmem.log (100 KB)


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