From mboxrd@z Thu Jan 1 00:00:00 1970 From: Karol Babioch Subject: Re: no brightness with acpi video since 3.3 [was Re: Issues with the sony-platform module] Date: Tue, 19 Jun 2012 15:57:17 +0200 Message-ID: <4FE0853D.7050503@babioch.de> References: <4FDA2051.3050108@babioch.de> <20120614203914.GA2645@kamineko.org> <1340067574.1682.5.camel@rui.sh.intel.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigA83E46E41F28B7D921863DA4" Return-path: In-Reply-To: <1340067574.1682.5.camel@rui.sh.intel.com> Sender: platform-driver-x86-owner@vger.kernel.org To: Zhang Rui Cc: Mattia Dongili , platform-driver-x86@vger.kernel.org, ACPI Devel Mailing List List-Id: linux-acpi@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigA83E46E41F28B7D921863DA4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, Am 19.06.2012 02:59, schrieb Zhang Rui: > so ACPI video driver is used before 3.3 and it works? > please try this patch > https://bugzilla.kernel.org/attachment.cgi?id=3D73576 > and boot without acpi_backlight=3Dvendor and see if it helps. First of all: Unfortunately I still can't change the brightness. But I couldn't reproduce a working solution with 3.3 and earlier (although it definitely worked with 3.0/3.1 at some point in the past), so it probably isn't your fault. But the patch fixes another huge problem: It finally let's me boot a 3.4 kernel with KMS enabled. Beforehand I would get a black/blank screen with kernels 3.4 and higher. This was some kind of a regression, as I've experienced this kind of issue also with 2.6.38 and earlier. The bug is filed here [1] and there are quite a few people affected by it. So, thanks a lot for that! Best regards, Karol Babioch [1] https://bugs.freedesktop.org/show_bug.cgi?id=3D50175 --------------enigA83E46E41F28B7D921863DA4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJP4IVAAAoJEHSaZc1HnzIVgfsQAJds9OUmyNF24GgBGuIH+WiA W0/oQEDVBy1+NpxhVnrM7CyC4wM9EDNc0l0WHs+xFq4oaNVE1MMFMvrHhM08o1GS BgsD5hwC3EbjP5eCYm2qucut8ZX/TerRlKlV55bVEk1rCz762g/Z5rLJ8Md8kR52 wDMi2wmiG2GYalaKCRKSg1J6+uoggjHpX1oZjnmewl8TalqGPOKP7jxuxO2rGG2P 4m06XuJ+oPaYCEXmcWRjWVwmqQ0zI415GX3/IgrPvKHBXsU9fkIzuYDN8ogq/3+f 0vn0CxVv42DQE9B5pe4xnPMRBtGUTSwphJWEkLa2vyZraUyaT9NkJ22p7E70/znL qoHC0nOY/W37G0fFqG9cpzivf65SJhzya5IVfVL9PZFp5A4dv1fRT29MQkILT/+d cACatjlDKMpvLUUMKdNyxNc1SkCEsDTh5hPpFbzBunoOejnrJiG7me1tbpqH4e3Y 4UsWal7wNk19tk6qtTcG2uWDnhCteTJVoXppGXWC/tEkVSwff5baqUSt0lydu3dF 800jm2tqpSXY45NoCiv2c0ODdJkXJLpscdNtLjIQcKnMtqNLjeJbMhcE6a/ow9SM 1E2EdOtGR507nRTLlsjDX3AUO+h4gV2zwSsibkn4fiEsttSBw1uRBVu/02eLlZyq O8w9+IuXvf6YnkwxoLVZ =Nw67 -----END PGP SIGNATURE----- --------------enigA83E46E41F28B7D921863DA4--