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apport-collect 1732990
and then change the status of the bug to 'Confirmed'.
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: artful
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https://bugs.launchpad.net/bugs/1732990
Title:
[Artful/Zesty] ACPI APEI error handling bug fixes
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
Error records which have multiple errors in them will incorrectly report all
errors after the first one. This results in garbage non-standard error trace
events to be generated, and for AER and MC errors there will be no kernel
action to help recover from these errors in the AER and EDAC drivers.
[Fix]
Patches in Linus tree fixes this issue:
aaf2c2fb0f51 ACPI / APEI: clear error status before acknowledging the error
c4335fdd3822 ACPI: APEI: fix the wrong iteration of generic error status block
[Testing]
Insert a e1000 pcie card into the system, run the following command that
should generate PCIe correctable errors, you will see only the first error in
each GHES report go to the AER driver rather than all errors from the GHES
reports.
$ sudo setpci -s 0002:00:00.0 0x70c.l=0x00808000;sudo setpci -s
0002:00:00.0 CAP_EXP+0x10.B=0x4b;sleep 1;sudo setpci -s 0002:00:00.0
CAP_EXP+0x10.B=0x48
Where "0002:00:00.0" being the root hub for the card.
[Regression Potential]
The two patches to ACPI APEI driver was cleanly cherry picked from linus's
tree and applied to Artful and Zesty. The patches were tested on QDF2400
platform where it was found to issue and don't introduce any regressions.
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