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 > <sebastian.riemer@xxxxxxxxxxxxxxxx> 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 > > -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
