This issue was here since a clean install. I've tested with latest
4.7.0rc2 kernel and the issue exists. Battery info is not available. The
first comment contains the solution from ArchWiki, which needs to build
my own kernel. I haven't test it myself on the tablet, though. The bios
config has nothing associated with battery, acpi or i2c, so I didn't try
to modify it.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1589383
Title:
Kernel With no I2C Controller Battery Support
Status in linux package in Ubuntu:
Confirmed
Bug description:
For Bay-Trail tablets, the battery controller is using I2C bus , which needs
the kernel to be compiled with symble ACPI_I2C_OPREGION [=y] (ref:
https://bugs.archlinux.org/task/44582). Otherwise the battery status &
information is unavailable. Ubuntu 16.04lts x86_64, Kernel
version:4.4.0-22-generic
---
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=ca8f4562-8c1d-42f0-8ce0-b6887e0a8800
InstallationDate: Installed on 2016-05-30 (6 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64
(20160420.1)
Lsusb:
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: To be filled by O.E.M. To be filled by O.E.M.
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic.efi.signed
root=UUID=2aa6be00-076a-4e2d-8ea7-1cc505c7925a ro quiet splash
intel_idle.max_cstate=1 vt.handoff=7
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
RelatedPackageVersions:
linux-restricted-modules-4.4.0-22-generic N/A
linux-backports-modules-4.4.0-22-generic N/A
linux-firmware 1.157
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: xenial
Uname: Linux 4.4.0-22-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/19/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 5.6.5
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: tPAD
dmi.board.vendor: TECLAST
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr5.6.5:bd12/19/2014:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnTECLAST:rntPAD:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.
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