From owner-freebsd-acpi@freebsd.org Tue Jul 5 14:30:23 2016 Return-Path: Delivered-To: freebsd-acpi@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 45EF5B736F3 for ; Tue, 5 Jul 2016 14:30:23 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-io0-x22d.google.com (mail-io0-x22d.google.com [IPv6:2607:f8b0:4001:c06::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0DF2B17FE for ; Tue, 5 Jul 2016 14:30:23 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: by mail-io0-x22d.google.com with SMTP id t74so175216702ioi.0 for ; Tue, 05 Jul 2016 07:30:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc; bh=noU2pnRens3cv2p+tTIKE981L621Y5BwujiFX/B93RI=; b=tX5U6XQ+5aybOJIVd8M5ouvD/4kQ2dmr1ZSjdTK7do/NDSSVpenlO6fMh5Vxg/f0zY Yb4epTV5h9j8p0zzWbkqw16mZwb24EvXZMLRpWcwSpwTgaFAvEEstyd7rte9Bvmnjvds iEms61YaZ5AaDs6qkh/14mMv3QrT8pR36SjT1ObyCsX7lXgzH7c1Ryx8A7TVWZXSsPr5 5Z3LDAw+XTexlQMqCv3+thSDl8KWWhRtK06guPNUvNRv0my66d2jHF3SlAMC3eKUHfll TpWdpu0EkRQQHe3bDplzQ3bs8ln29ba0lRfAjovPmoOskNAGyyStBZFKzkMvgCcu9N9i 59LA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:date :message-id:subject:from:to:cc; bh=noU2pnRens3cv2p+tTIKE981L621Y5BwujiFX/B93RI=; b=mFgQv5ull1dTGF7uUsQ4DdaKIcgsEugMWR1N+9LMB+K6g8xbinBAd0mJHVBEFC/usH Ms35+ZLHWj6rgz+c3tWze9jT6JInmMhbi6yBG+eHVMTEujfWwMfAUqKMLn8eRi61BjSb dm+jMXH4RLBUX+KKrjgbBaPXcnng7LXyls0uIxsYKDkRgb8IFTO0cKnTm5SJkoo8+SF1 GXsoWoLTdtQPlp7dtNzIrhKyYTw8EIwSJEP+7X+IVLQI1D0ZHh+Dftd0ytEEznLAYuXZ x6Abzfqzr6T5HKZRdcTrG8U2+pjjjKpq0K6yPC01L3hcjHZowRtuGszywuQvmtKPkCmL WUyw== X-Gm-Message-State: ALyK8tKAQz2qNK1ikkVtiTGtqkdLjLz53lbu8+fkUkA/6OSSV7Kk9X0bfh2IyDpHXuQzsv5hgBD0S+MfXvKCCg== MIME-Version: 1.0 X-Received: by 10.107.16.24 with SMTP id y24mr12919162ioi.123.1467729022378; Tue, 05 Jul 2016 07:30:22 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.36.210.212 with HTTP; Tue, 5 Jul 2016 07:30:20 -0700 (PDT) Received: by 10.36.210.212 with HTTP; Tue, 5 Jul 2016 07:30:20 -0700 (PDT) In-Reply-To: <1467727664-c61d10674bafe6227cdc75f523f047ad@olivarim.com> References: <1467727664-c61d10674bafe6227cdc75f523f047ad@olivarim.com> Date: Tue, 5 Jul 2016 07:30:20 -0700 X-Google-Sender-Auth: WBPA0_nBTvOjHqFeOZ8ie6HLUIw Message-ID: Subject: Re: Thinkpad T450: can't change display backlight From: Adrian Chadd To: lists@olivarim.com Cc: freebsd-acpi@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.22 X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jul 2016 14:30:23 -0000 Hi, It needs the graphics driver work done. The backlight control is done by the driver on these chips, via acpi but not entirely implemented within acpi. A On Jul 5, 2016 10:13 AM, "Marin Bernard" wrote: > > > Hi, > > I just bought a Lenovo Thinkpad T450 laptop and installed FreeBSD on top > of it. It runs fine except I'm not able to change the display backlight. > The laptop embeds a Core i5-5300U CPU with an Intel Graphics 5500 adapter > (Broadwell). I know the adapter is not yet supported, but I hoped to have > backlight control working anyway! > > Backlight control is working fine with OpenBSD 5.9, Linux 4.1+ and > Windows, which is not very surprising as those OSes also support the > display adapter. It's not working on FreeBSD 10.3-RELEASE nor 11.0-ALPHA6. > > What I have tried: > - I tried to load acpi_ibm and acpi_video kernel modules and tweak the > sysctl they provide: I was able to modify the systctl values, but backlight > remained the same. > - I also tried to install graphics/intel-backlight. There again: I was > able to change values, but it didn't change the backlight. > - I tried to load the i915kms intel modul, just in case backlight > control needed this to work properly. As before, no effect. I think the > module is just ignoring my adapter as it does not support it. > > I'm ready to cope with the VESA driver for some time but I'd really like > to get backlight control working. Do you have suggestions ? Is there > anything I can do to help ? > > I use the UEFI framebuffer with vt in graphics mode. I did not try to run > Xorg yet. Should I do it ? > > Thanks, > > --Marin > > > _______________________________________________ > freebsd-acpi@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-acpi > To unsubscribe, send any mail to "freebsd-acpi-unsubscribe@freebsd.org" >