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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