2015-01-27 7:38 GMT+01:00 Andrew Wilcox <awil...@wilcox-tech.com>: > Ranjan1018 . sent: 26 January 2015 06:19: > > 2015-01-24 23:25 GMT+01:00 Adrian Chadd <adr...@freebsd.org>: > > > The backlight adjustment doesn't work on my ivybridge mobile laptop > > > (Lenovo X230) after the dri update. > > > > > I have the same issue on my Samsung Ativ 2 laptop. > > I have a Sandy Bridge laptop (Apple MacBook Pro 8,2) - HD 3000: > > vgapci0@pci0:0:2:0: class=0x030000 card=0x00db106b chip=0x01268086 > rev=0x09 hdr=0x00 > vendor = 'Intel Corporation' > device = '2nd Generation Core Processor Family Integrated Graphics > Controller' > class = display > subclass = VGA > > It is running: FreeBSD pwyll.foxkit.us 11.0-CURRENT #1 r277781M: Mon Jan > 26 18:41:15 CST 2015 r...@pwyll.foxkit.us:/usr/obj/usr/src/sys/GENERIC > amd64 > > I have no issues using acpi_video's sysctls > (hw.acpi.video.lcd0.brightness) to adjust backlight, though it does not > have good granularity. The stepping is about 7, so it goes as > 13%..20%..27%..35%..etc. > > > > The "intel_backlight" program from intel-gpu-tools" also no longer > > > changes the backlight value. > > This program works fine for me on both an older kernel (r277523) and this > kernel (r277781), after applying some patches to allow the library to build > on FreeBSD. It also has better granularity (the stepping is 2-3). > > If there is anything I can do/run to aide in debugging why it works for me > but not others, let me know. > > Best, > Andrew > -- > Andrew Wilcox, C/C++/Python developer, kernel hacker > Blog: http://blog.foxkit.us/ WWW: http://foxkit.us/ > GitHub: https://github.com/awilfox > > Hi, my Samsung laptop has an Intel IvyBridge: vgapci0@pci0:0:2:0: class=0x030000 card=0xc708144d chip=0x01668086 rev=0x09 hdr=0x00 vendor = 'Intel Corporation' device = '3rd Gen Core processor Graphics Controller' class = display subclass = VGA
The regression was introduced in r277487. The backlight adjustment works in FreeBSD 11.0-CURRENT r277395, r277486 but not in r277487, r277534 and r277639. Regards, Maurizio _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"