Date: Wed, 10 Feb 2016 17:28:05 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 207086] LCD Brightness Message-ID: <bug-207086-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D207086 Bug ID: 207086 Summary: LCD Brightness Product: Base System Version: 10.2-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: aeuii@posteo.de CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org I'm unable to change LCD brightness on Lenovo Thinkpad Edge E145 using =E2= =98=BC+ and =E2=98=BC- buttons. To be more specific, the brightness can be changed only= until an early system boot. It works in the loader menu, and right after kernel is loaded, but stops working soon after that (perhaps when acpi0 is loaded: =E2=80=9Cacpi0: <LENOVO TP-HS> on motherboard=E2=80=9D). I tested multiple FreeBSD version: Affected FreeBSD versions: - 11.0: FreeBSD-11.0-CURRENT-amd64-20160206-r295345-memstick.img - 10.3: FreeBSD-10.3-PRERELEASE-amd64-20160127-r294913-memstick.img - 10.2: 10.2-RELEASE-p12 - 10.1: FreeBSD-10.1-RELEASE-amd64-memstick.img Working version: - 9.3: FreeBSD-9.3-RELEASE-amd64-memstick.img (with =E2=80=9CCPU0: local ACPI error 0x80=E2=80=9D) As you can see, the problem occurred between 9.3 and 10.1. I also tried different methods to change the brightness on 10.2: acpi_call =3D=3D=3D=3D=3D=3D=3D=3D=3D acpi_call -v -p '\VBRU' Path: \VBRU Number of arguments: 0 ioctl: Device not configured # no effect acpi_ibm =3D=3D=3D=3D=3D=3D=3D=3D sysctl dev.acpi_ibm.0.lcd_brightness=3D7 # value changes, but it no effect on the brightness acpi_video =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D sysctl hw.acpi.video.lcd0.brightness=3D50 hw.acpi.video.lcd0.brightness: 50 -> # # no effect pressing Fn+=E2=98=BC+- buttons has no effect, but logs: can't evaluate \134_SB_.PCI0.VGA_.LCD_._BQC - AE_NOT_FOUND --=20 You are receiving this mail because: You are the assignee for the bug.=
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