diff options
| author | Leah Rowe <leah@libreboot.org> | 2024-12-29 01:20:33 +0000 |
|---|---|---|
| committer | Leah Rowe <leah@libreboot.org> | 2024-12-29 01:20:33 +0000 |
| commit | 603105f3b4e1bc312f4c782f752007f64bb9c4f0 (patch) | |
| tree | 640ce1d3334784f31bfe7fae154fd1b0d80ed392 /resources/coreboot/peach_pit/config | |
| parent | 754bd1e6ca3aa95bb1aa44b97612762e37c957b8 (diff) | |
t480/t480s: Disable TPM2 to mitigate SeaBIOS lag
SeaBIOS was lagging a lot, on startup and when executing
almost any payload, especially when doing anything in the
ESC menu.
I set the debug level to *21*, and thoroughly analysed the
logs. I found entries such as this:
Checking for bootsplash
WARNING - Timeout at wait_reg8:81!
TCGBIOS: Return value from sending TPM2_CC_StirRandom = 0x00000000
WARNING - Timeout at wait_reg8:81!
TCGBIOS: Return value from sending TPM2_CC_GetRandom = 0x00000000
WARNING - Timeout at wait_reg8:81!
TCGBIOS: Return value from sending TPM2_CC_HierarchyChangeAuth = 0x00000000
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc16e
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc1c5
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc211
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc25d
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc2a9
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc2f5
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc341
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc38d
WARNING - Timeout at wait_reg8:81!
TCGBIOS: LASA = 0x7a9fc000, next entry = 0x7a9fc3d9
Searching bootorder for: HALT
Mapping hd drive 0x000f49e0 to 0
I'm not quite certain what the problem is, but disabling TPM2
made the problem go away; SeaBIOS is snappy again.
TPM is security threatre anyway.
Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'resources/coreboot/peach_pit/config')
0 files changed, 0 insertions, 0 deletions