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    SubjectRe: [BISECTED] HP G7000 battery disappears after suspend
    Date
    Hi Len,

    On Friday 10 July 2009, Bartlomiej Zolnierkiewicz wrote:
    > On Thursday 09 July 2009 22:11:30 Rafael J. Wysocki wrote:
    > > On Thursday 09 July 2009, Alan Jenkins wrote:
    > > > 2009/7/8 Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>:
    > > > > On Wednesday 08 July 2009 21:41:17 Rafael J. Wysocki wrote:
    > > > >> On Wednesday 08 July 2009, Alan Jenkins wrote:
    > > > >> > Hi,
    > > > >> >
    > > > >> > I've borrowed this laptop for a few days. Linux works pretty well,
    > > > >> > but I found a problem on newer kernels. After suspend it claims the
    > > > >> > battery has been removed. E.g. /proc/acpi/battery/BAT0/state claims
    > > > >> > the battery is not present (but it is).
    > > > >> >
    > > > >> > I've attached acpidump and dmidecode output at
    > > > >> > <http://bugzilla.kernel.org/show_bug.cgi?id=13745>. I still have
    > > > >> > access to the laptop for further tests, but only until Friday.
    > > > >> >
    > > > >> > I bisected it to the commit below. Manually reverting the patch fixes
    > > > >> > the problem (in both 2.6.30 and 2.6.31-rc2).
    > > > >>
    > > > >> Well, the commit below can't be reverted, because that would cause the boxes
    > > > >> it fixed to stop working.
    > > > >>
    > > > >> Now, the only case this patch can make any difference is when the BIOS doesn't
    > > > >> set SCI_EN before returning control the the kernel, which quite evidently is a
    > > > >> BIOS bug. The fact that the battery doesn't work with this patch applied means
    > > > >> that the BIOS not only doesn't set SCI_EN, but also expects it to remain unset,
    > > > >> which is insane.
    > > > >>
    > > > >> IMO this is a "won't fix", sorry.
    > > > >
    > > > > Lets be pragmatic here..
    > > > >
    > > > > Besides this is a regression and we are already handling some such insane
    > > > > systems in STR case. Moreover sending SMI ACPI_ENABLE command may result in
    > > > > some things happening behind our back and not only setting of SCI_EN bit..
    > > > >
    > > > > PS Looking at the set_sci_en_on_resume quirk history it seems that if we are
    > > > > lucky we may may fix another issue (screaming IRQ one) at the same time :)
    > > > >
    > > > > Alan, could you try this patch?
    > > > >
    > > > > ---
    > > > > debug patch (needs to have both CONFIG_SUSPEND=y & CONFIG_HIBERNATION=y)
    > > > >
    > > > > drivers/acpi/sleep.c | 13 ++++++++++++-
    > > > > 1 file changed, 12 insertions(+), 1 deletion(-)
    > > > >
    > > > > Index: b/drivers/acpi/sleep.c
    > > > > ===================================================================
    > > > > --- a/drivers/acpi/sleep.c
    > > > > +++ b/drivers/acpi/sleep.c
    > > > > @@ -383,6 +383,14 @@ static struct dmi_system_id __initdata a
    > > > > },
    > > > > },
    > > > > {
    > > > > + .callback = init_set_sci_en_on_resume,
    > > > > + .ident = "Hewlett-Packard HP G7000 Notebook PC",
    > > > > + .matches = {
    > > > > + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    > > > > + DMI_MATCH(DMI_PRODUCT_NAME, "HP G7000 Notebook PC"),
    > > > > + },
    > > > > + },
    > > > > + {
    > > > > .callback = init_old_suspend_ordering,
    > > > > .ident = "Panasonic CF51-2L",
    > > > > .matches = {
    > > >
    > > > Thanks for coding this up for me in full. It works, the battery now
    > > > survives, and it does indeed remove the IRQ warning.
    > >
    > > Great, thanks for testing, Bart, thanks for the patch!
    > >
    > > Len, can you add the Bart's patch to your 2.6.31 queue, please?
    >
    > Here is the final patch version:
    >
    > From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
    > Subject: [PATCH] acpi: HP G7000 Notebook needs a SCI_EN resume quirk
    >
    > This fixes regression (battery "vanishing" on resume) introduced by
    > commit d0c71fe7ebc180f1b7bc7da1d39a07fc19eec768 ("ACPI Suspend: Enable
    > ACPI during resume if SCI_EN is not set") and also the issue with
    > the "screaming" IRQ 9.
    >
    > Fixes:
    > http://bugzilla.kernel.org/show_bug.cgi?id=13745
    >
    > Reported-and-tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
    > Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
    > Cc: stable@kernel.org
    > Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

    I'm adding this patch to my linux-next branch and will push it to Linus for
    2.6.32. Is that fine with you?

    Rafael


    > ---
    > drivers/acpi/sleep.c | 13 ++++++++++++-
    > 1 file changed, 12 insertions(+), 1 deletion(-)
    >
    > Index: b/drivers/acpi/sleep.c
    > ===================================================================
    > --- a/drivers/acpi/sleep.c
    > +++ b/drivers/acpi/sleep.c
    > @@ -383,6 +383,14 @@ static struct dmi_system_id __initdata a
    > },
    > },
    > {
    > + .callback = init_set_sci_en_on_resume,
    > + .ident = "Hewlett-Packard HP G7000 Notebook PC",
    > + .matches = {
    > + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
    > + DMI_MATCH(DMI_PRODUCT_NAME, "HP G7000 Notebook PC"),
    > + },
    > + },
    > + {
    > .callback = init_old_suspend_ordering,
    > .ident = "Panasonic CF51-2L",
    > .matches = {
    >


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