Bug 8886

Summary:	No battery info with 2.6.23-rc3 kernels
Product:	ACPI	Reporter:	Christian Casteyde (casteyde.christian)
Component:	EC	Assignee:	Alexey Starikovskiy (astarikovskiy)
Status:	CLOSED CODE_FIX
Severity:	normal	CC:	acpi-bugzilla, vladimir.p.lebedev
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.23-rc3	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	dmesg for 2.6.22.1-cfs19, which works nice dmesg for 2.6.23-rc3, which doesn't detect the battery Undelete register query function

Description Christian Casteyde 2007-08-13 09:21:03 UTC

Most recent kernel where this bug did not occur: 2.6.22.x
Distribution: Slackware 12
Hardware Environment: Athlon64 3000 + nForce3 150 on Aspire 1511 LMi
Software Environment: none
Problem Description:
With recent kernels (2.6.23-rc3, maybe 2.6.23-rc2 but I'm not sure), the battery information is not available anymore on some laptops.
Dmesg info for different kernel versions appended.

Steps to reproduce:
Maybe specific to my hardware. It used to have a DSDT replacement for old kernels (2.6.16 for instance), but since 2.6.19 up to 2.6.22 it was not necessary. Now, it does work with neither original nor fixed DSDT.

Comment 1 Christian Casteyde 2007-08-13 09:22:26 UTC

Created attachment 12366 [details]
dmesg for 2.6.22.1-cfs19, which works nice

Please note that even dmesg says battery absent, it ** is ** detected and usable through /proc/acpi/battery/BAT1/state and info.

Comment 2 Christian Casteyde 2007-08-13 09:23:29 UTC

Created attachment 12367 [details]
dmesg for 2.6.23-rc3, which doesn't detect the battery

The battery is not detected anymore in /proc/acpi/battery/BAT1/state, info and so.

Comment 3 Alexey Starikovskiy 2007-08-13 20:58:51 UTC

Created attachment 12369 [details]
Undelete register query function

Please check if this patch helps.

Comment 4 Len Brown 2007-08-13 22:18:29 UTC

patch in comment #3 checked into acpi tree.

Comment 5 Christian Casteyde 2007-08-14 01:43:25 UTC

I will test the patch today.

Moreover, I can confirm this is a 2.6.23-rc3 regression (2.6.23-rc2 still works).

Comment 6 Christian Casteyde 2007-08-14 02:20:35 UTC

2.6.23-rc3+patch = OK
It now works.
Thanks a lot

Comment 7 Len Brown 2007-08-14 20:36:40 UTC

patch in comment #3 shipped in 2.6.23-rc3-git1
closed