Blacklist broken ThinkPads to use 32 bit FADT addresses
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- v1 Latest3 patches 47 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | ACPICA: Add acpi_gbl_force_rsdt variabledrivers/ drivers/ include/ | +4 | 0 replies | |
| 2/3 | Introduce acpi_root_table=rsdt boot param and dmi list to force rsdtDocumentation/ drivers/ | +42 | 46 replies | |
| 3/3 | Remove R40e c-state blacklistdrivers/ | +0 | 0 replies |
Reviews trailers per patch
None of the 3 patches has a Reviewed-by or Acked-by.
| Patch | Mark Doughty |
|---|---|
| 1/3 | T-b |
| 2/3 | T-b |
| 3/3 | T-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [RESEND] [PATCH 0/3] Blacklist broken ThinkPads to use 32 bit FADT addresses
Hi,
can this be taken into .28 if it works out with acpica integration.
Patches are in OpenSUSE for quite a while now (also 11.0) and the issue has been evaluate to the ground now.
Lenovo confirmed that some rare models which got Vista support added late through BIOS upgrades could have wrong 64 bit addresses.
Vista also takes the broken 64 bit addresses like Linux does (spec conform). XP does take the correct 32 bit addresses.
A generic approach (e.g. check through _OSI) does not work, because:
- the affected models support Vista (there the wrong addresses are also
taken, but
the symptoms seem not to happen or are also workarounded)
- Those IO addresses are touched before the DSDT is parsed -> no OSI OS feature support check possible.
Be aware that one patch makes changes in ACPICA code.
Thanks,
Thomas