Opened 6 years ago

Closed 6 years ago

#7964 closed defect (fixed)

C3 laptops sometimes identified as pre-B3 (B2)

Reported by: wad Owned by: rsmith
Priority: blocker Milestone: 8.1.1 (was Update1.1)
Component: not assigned Version: not specified
Keywords: EC Cc:
Blocked By: Blocking:
Deployments affected: Action Needed: add to build
Verified: no

Description

Some C3 motherboards are erroneously identified as B2 motherboards by the EC. This can cause brick (or brick-like) symptoms. They are running Q2E12 firmware.

The hardware components are fine -- the board ID voltage is ALMOST identical between working and non-working units. The non-working units have board ID voltages slightly below 2.06V (the ideal for C3), but still well within tolerances.

Change History (2)

comment:1 in reply to: ↑ description Changed 6 years ago by rsmith

  • Action Needed changed from code to add to build

Replying to wad:

Some C3 motherboards are erroneously identified as B2 motherboards by the EC. This can cause brick (or brick-like) symptoms. They are running Q2E12 firmware.

The hardware components are fine -- the board ID voltage is ALMOST identical between working and non-working units. The non-working units have board ID voltages slightly below 2.06V (the ideal for C3), but still well within tolerances.

Typo in the table. Will be in the upcoming Q2E13 release.

comment:2 Changed 6 years ago by cscott

  • Resolution set to fixed
  • Status changed from new to closed

This is in joyride. (Actually, Q2E15 is in joyride now.) Added Q2E15 to the stable build repo as well. Closing.

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