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=207086 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 ☼+ and ☼- 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: “acpi0: <LENOVO TP-HS> on motherboard”). 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 “CPU0: local ACPI error 0x80”) 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 ========= acpi_call -v -p '\VBRU' Path: \VBRU Number of arguments: 0 ioctl: Device not configured # no effect acpi_ibm ======== sysctl dev.acpi_ibm.0.lcd_brightness=7 # value changes, but it no effect on the brightness acpi_video ========== sysctl hw.acpi.video.lcd0.brightness=50 hw.acpi.video.lcd0.brightness: 50 -> # # no effect pressing Fn+☼+- buttons has no effect, but logs: can't evaluate \134_SB_.PCI0.VGA_.LCD_._BQC - AE_NOT_FOUND -- You are receiving this mail because: You are the assignee for the bug.
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