From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Riemer Subject: Re: samsung-laptop: Samsung 530U3C major ACPI issues Date: Tue, 30 Oct 2012 13:23:35 +0100 Message-ID: <508FC6C7.8040906@profitbricks.com> References: <5087F449.6040906@profitbricks.com> <5087F70E.3010406@profitbricks.com> <5087FDA0.5010002@profitbricks.com> <508811BC.9050006@profitbricks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-bk0-f46.google.com ([209.85.214.46]:54228 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758043Ab2J3MXh (ORCPT ); Tue, 30 Oct 2012 08:23:37 -0400 Received: by mail-bk0-f46.google.com with SMTP id jk13so126428bkc.19 for ; Tue, 30 Oct 2012 05:23:35 -0700 (PDT) In-Reply-To: Sender: platform-driver-x86-owner@vger.kernel.org List-ID: To: Corentin Chary Cc: platform-driver-x86@vger.kernel.org, Adrian Maertins Hi Corentin, I've found the related bugs in the kernel bugzilla. These are really ACPI issues. https://bugzilla.kernel.org/show_bug.cgi?id=45461 https://bugzilla.kernel.org/show_bug.cgi?id=44161 If my colleague Adrian wouldn't have removed Windows from his laptop, then it would be possible to do some reverse engineering, I guess. Where do vendor specific ACPI/WMI drivers hide for Windows? In the chipset drivers? SMBus? Special are also the HECI/MEI devices with that laptop model. Haven't seen such drivers before - these are also in the linux staging drivers. Cheers, Sebastian On 24.10.2012 20:21, Corentin Chary wrote: > On Wed, Oct 24, 2012 at 5:05 PM, Sebastian Riemer > wrote: >> Hi Corentin, >> >> On 24.10.2012 17:24, Corentin Chary wrote: >>> samsung-laptop doesn't use ACPI, only SABI interface. >> I thought it does for the video driver/backlight control. The strange >> thing is that the issues start directly after loading the driver. >> Perhaps it has to be blacklisted for this model. > samsung-laptop talks to the bios directly using SABI. But the BIOS is > also related to ACPI, so things can get ugly I guess... > >> Kernel log: >> >> samsung_laptop: detected SABI interface: SwSmi@ >> samsung_laptop: Backlight controlled by ACPI video driver >> ACPI Warning: 0x000000000000efa0-0x000000000000efbf SystemIO conflicts >> with Region \_SB_.PCI0.SBUS.SMBI 1 (20120711/utaddress-251) >> ACPI: If an ACPI driver is available for this device, you should use it >> instead of the native driver > Hum can you try to blacklist samsung-laptop, load it manually, and > send me the dmesg ? > If possible with and without acpi_backlght=vendor boot parameter. > >> Where are the custom ACPI drivers in the kernel tree if not in >> drivers/platform/x86 ? > drivers/paltform/x86 contains x86 platform drivers, and some of them > are ACPI drivers, but not all of them. > >>> This looks like ACPI issues, please file a bug on bugzilla, but first >>> thing, check for bios updates :). >> Which bugzilla? Sorry, I'm not an ACPI specialist. > The linux kernel bugzilla. But before doing that, are this issues only > hapenning when/if samsung-laptop is loaded ? > Can you send me he output of: > > tree /sys/devices/platform/samsung-laptop/ > tree /sys/class/backlight > > Thanks > >