Hi,
On Sat, Apr 07, 2018 at 01:04:27PM +0200, Marcus Lundblad wrote:
> Source: linux
> Severity: normal
>
> Dear Maintainer,
>
> I have a Lamina T-1016B 2-in-1 tablet where the battery is not detected
> (the top bar in GNOME shows only the power icon, like on the desktop machine).
> Checking in /var/log/messages I could see the following (grep:ing on ACPI):
>
> Apr 6 09:17:21 eridanus kernel: [ 5.663167] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 09:17:21 eridanus kernel: [ 5.956763] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 08:20:24 eridanus kernel: [ 5.720266] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 08:20:24 eridanus kernel: [ 6.020086] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 08:23:09 eridanus kernel: [ 5.656934] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 08:23:09 eridanus kernel: [ 5.979635] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 08:25:49 eridanus kernel: [ 5.849791] ACPI: AC: found native INT33F4 PMIC, not loading
> Apr 6 08:25:49 eridanus kernel: [ 6.150902] ACPI: AC: found native INT33F4 PMIC, not loading
>
> Checking in the kernel sources, I could see the following:
> In https://github.com/torvalds/linux/blob/master/drivers/acpi/battery.c
>
> There is a blacklist of ACPI HIDs at line 101:
>
> /* Lists of PMIC ACPI HIDs with an (often better) native battery driver */
> static const char * const acpi_battery_blacklist[] = {
> "INT33F4", /* X-Powers AXP288 PMIC */
> };
>
> Further down there's a section for bailing out on blacklisted HIDs at 1491:
>
> for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++)
> if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) {
> pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME
> ": found native %s PMIC, not loading\n",
> acpi_battery_blacklist[i]);
> return;
> }
>
> In __init acpi_battery_init_async
>
> I suppose enabling the approriate module(s) would maybe solve this.
> In the make menuconfig I could see the following drivers:
>
> AXP288_ADC, AXP288_CHARGER, and AXP288_FUEL_GAUGE
>
> I tried building a custom kernel, but upon booting in panics,
> but it seems to be because the initrams fs is not able to mount, I guess
> the image wasn't properly installed in GRUB, or something like that.
>
> By the way, the info below shows kernel 4.14, but that's because I ran
> reportbug from my desktop, and haven't rebooted into the newest kernel yet
> I hope this doesn't create a hassle.
Last year the blacklist was introduced for the ACPI battery driver:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/acpi/battery.c?id=dccfae6d4f4c2cfa1fdc3bf55755fcad02184b99
Enabling AXP288_FUEL_GAUGE (and dependencies) should result in
proper battery information. If there are still issues with your
system after enabling the config option, send a mail to the
following addresses:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/MAINTAINERS?id=dccfae6d4f4c2cfa1fdc3bf55755fcad02184b99#n10012
-- Sebastian
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