Date: Wed, 28 Jan 2015 01:06:00 -0600 From: "Andrew Wilcox" <AWilcox@Wilcox-Tech.com> To: "'Ranjan1018 .'" <214748mv@gmail.com> Cc: 'freebsd-current' <freebsd-current@freebsd.org> Subject: RE: drm2 regression: backlight adjustment on ivybridge no longer works Message-ID: <009301d03ac8$dfa09e20$9ee1da60$@Wilcox-Tech.com> In-Reply-To: <CACyC=qZeG8L%2BbZu=RacU_rdNVTFhyCFH2A%2BdNw71%2B09cZ20VgA@mail.gmail.com> References: <CAJ-VmomfBrBN6HVBq5FoRf1nRqvrhiDOw6RHjfs13j-9cqi1vg@mail.gmail.com> <CACyC=qYMT3VFx4GxypJ6F61pKSaxE0JKBK%2BudDMPSh4_ASAi6w@mail.gmail.com> <000e01d039fb$d5959930$80c0cb90$@Wilcox-Tech.com> <CACyC=qZeG8L%2BbZu=RacU_rdNVTFhyCFH2A%2BdNw71%2B09cZ20VgA@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Ranjan1018 . sent: 27 January 2015 23:42: > my Samsung laptop has an Intel IvyBridge: [snip] > The regression was introduced in r277487. > The backlight adjustment works in FreeBSD 11.0-CURRENT r277395, = r277486 > but not in r277487, r277534 and r277639. Hrm. That is interesting. A few questions I have then. - What happens if you set drm.i915.invert_brightness to -1 in kenv(1) or = /boot/loader.conf? - What happens if you set drm.i915.invert_brightness to 1 in kenv(1) or = /boot/loader.conf? - What version of graphics/libdrm do you have installed? Did you = rebuild it after installing the new kernel? (This shouldn't be = necessary, but I am trying to gather all details.) Let's start there and see if we can pin down a cause. Best, Andrew -- Andrew Wilcox, C/C++/Python developer, kernel hacker Blog: http://blog.foxkit.us/ WWW: http://foxkit.us/ GitHub: https://github.com/awilfox
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?009301d03ac8$dfa09e20$9ee1da60$>