Yes, 3.10.0-rc6 fixes the problem (sorry for not checking this before contacting you). Rafael: 3.8: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:18/LNXVIDEO:00 3.9: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:18/LNXVIDEO:00 3.10-rc6: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:19/LNXVIDEO:00 // Cork ----- Original Message ----- > From: "Aaron Lu" <aaron.lu@xxxxxxxxx> > To: "Rafael J. Wysocki" <rjw@xxxxxxx>, "Cork" <kernel@xxxxxxxxxxxx> > Cc: linux-acpi@xxxxxxxxxxxxxxx > Sent: Thursday, 27 June, 2013 3:38:49 AM > Subject: Re: Sys backlight is empty since landing of "ACPI / PCI: Make PCI root driver use struct acpi_scan_handler" > > On 06/27/2013 06:08 AM, Rafael J. Wysocki wrote: > > On Wednesday, June 26, 2013 08:38:49 PM Cork wrote: > >> // Cork > > > > OK, thanks. > > > > The initialization ordering obviously changed in 3.9 and the ACPI > > video > > driver fails to find your backlight device. > > > > Can you please tell me what the output of > > > > $ find /sys/devices/ -name LNXVIDEO\* > > > > is on your system in 3.9 and 3.8? > > This should be the same problem as bug 58091, where one of the > reporter > is using a similar system Clevo_P150HMx. And I've checked the ACPI > dump > of Cork's system, there is also a _ROM method under PCI0. > > Cork, > Possible to test v3.10-rc6 or later kernels? There is a fix for your > problem, thanks. > > Reference: https://bugzilla.kernel.org/show_bug.cgi?id=58091 > > -Aaron > > > > > Rafael > > > > > >> > >> ----- Original Message ----- > >>> From: "Rafael J. Wysocki" <rjw@xxxxxxx> > >>> To: "Cork" <kernel@xxxxxxxxxxxx> > >>> Cc: linux-acpi@xxxxxxxxxxxxxxx, "Aaron Lu" <aaron.lu@xxxxxxxxx> > >>> Sent: Wednesday, 26 June, 2013 10:05:38 PM > >>> Subject: Re: Sys backlight is empty since landing of "ACPI / PCI: > >>> Make PCI root driver use struct acpi_scan_handler" > >>> > >>> On Wednesday, June 26, 2013 09:52:46 PM Rafael J. Wysocki wrote: > >>>> On Wednesday, June 26, 2013 07:31:00 PM Cork wrote: > >>>>> Hello. This is my first time sending a report like this, so > >>>>> please excuse me if I'm missing some vital information. > >>>>> > >>>>> From updating the kernel in Arch linux to 3.9 the brightness > >>>>> controls stopped working on my Clevo P0150HM. I have tried the > >>>>> acpi_backlight=vendor boot parameter but it makes no > >>>>> difference. > >>>>> > >>>>> While researching this problem I've found that > >>>>> /sys/class/backlight is empty in the versions where the buttons > >>>>> isn't working. Bisecting points to > >>>>> 00c43b9682507dc622c03172fde1032e2a216e9d [1] as the first > >>>>> commit > >>>>> showing the symptoms. > >>>>> > >>>>> Attached is the output from journalctl -b _TRANSFORM=kernel for > >>>>> the two versions. Not sure what other useful information I can > >>>>> provide apart from that, so please direct me if there is > >>>>> something missing. > >>>>> > >>>>> [1] > >>>>> https://github.com/torvalds/linux/commit/00c43b9682507dc622c03172fde1032e2a216e9d > >>>> > >>>> Interesting. > >>>> > >>>> Please send the output of acpidump from your machine. > >>> > >>> Also please put initcall_debug into the kernel command line and > >>> send > >>> dmesg from > >>> the working and not working kernels with that. > >>> > >>> Thanks, > >>> Rafael > >>> > >>> > >>> -- > >>> I speak only for myself. > >>> Rafael J. Wysocki, Intel Open Source Technology Center. > >>> > > -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
