[Bug 213109] New: ideapad-laptop: Regression in 5.12.x for Battery conservation mode

[Bug 213109] New: ideapad-laptop: Regression in 5.12.x for Battery conservation mode

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213109

            Bug ID: 213109
           Summary: ideapad-laptop: Regression in 5.12.x for Battery
                    conservation mode
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.12.4
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Platform_x86
          Assignee: drivers_platform_x86@kernel-bugs.osdl.org
          Reporter: fouad.fakih@gmail.com
        Regression: Yes

Enabling battery conservation mode no longer works on Linux 5.12.x for Lenovo
Legion 5 15ARH05.

It works with kernel versions 5.11 and 5.10 on Arch Linux.

Modifying `/sys/bus/platform/drivers/ideapad_acpi/VPC2004:00/conservation_mode`
fails with message : `Input/output error`

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[Bug 213109] ideapad-laptop: Regression in 5.12.x for Battery conservation mode

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213109

Barnabás Pőcze (pobrn@protonmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pobrn@protonmail.com

--- Comment #1 from Barnabás Pőcze (pobrn@protonmail.com) ---
Thanks for bringing this up. The issue has already been reported in
https://bugzilla.kernel.org/show_bug.cgi?id=212985 and a patch has been sent to
fix it (
https://lore.kernel.org/platform-driver-x86/20210507235333.286505-1-pobrn@protonmail.com/
).

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[Bug 213109] ideapad-laptop: Regression in 5.12.x for Battery conservation mode

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=213109

Hans de Goede (jwrdegoede@fedoraproject.org) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jwrdegoede@fedoraproject.or
                   |                            |g
         Resolution|---                         |CODE_FIX

--- Comment #2 from Hans de Goede (jwrdegoede@fedoraproject.org) ---
I've added the patch fixing this to the fixes branch of the pdx86 kernel tree:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=fixes

The contents of this branch will be in the next pdx86-fixes pull-req which I
send to Linus for 5.13. Since the patch has a fixes tag it will get added
automatically to the 5.12 kernels once Linus has merged it, so this bug can be
closed now.

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