On Thursday, June 27, 2013 05:40:06 AM Cork wrote: > Yes, 3.10.0-rc6 fixes the problem (sorry for not checking this before contacting you). OK, great! Thanks, Rafael > 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. > > >>> > > > > -- 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
