Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
On Sun, Dec 2, 2012 at 2:49 PM, Tom St Denis wrote: > Ok so on v3.7-rc1 [and I suspect up] I can manually control the brightness by > echoing to > > /sys/class/backlight/intel_backlight/brightness > > But I still can't use the buttons to control it (it only goes one tick down > from max and stops there). I'm using GNOME3 from a x86_64 unstable debian > install [up to date with latest]. > > I just noticed that under v3.7 I have a new directory > /sys/class/backlight/acpi_video1 which is what GNOME is actually controlling. > I can't disable ACPI video control so is there a workaround? Hah, acpi registered a broken backlight driver, which overwrites the intel backlight - for once it's not i915.ko's fault ;-) For a workaround either disable the acpi backlight with acpi_backlight=vendor (iirc) kernel option or teach the X driver that you want a different backlight driver in the xorg.conf (Option "Backlight" "intel_backlight" should do the trick). -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Including a bunch more lists to the cc. On Sun, Dec 2, 2012 at 12:42 PM, Daniel Vetter wrote: > On Sun, Dec 2, 2012 at 12:32 PM, Tom St Denis > wrote: >> I've narrowed it down to sometime between v3.6.8 and v3.7-rc1. So none of >> the v3.7 series will work with this GPU/panel. > > Hm, that's still a few hundred relevant commits intermingled with a > few thousand that likely don't matter ;-) Can you please attempt a > kernel bisect with git? For a nice howto check out > http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/ > > Also, can you please check which of the different backlight controls > in /sys/class/backlight work on 3.6 (and whether any of them still > work on 3.7)? > > Thanks, Daniel > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Thanks Daniel so I'm taking back my bug report on the i915 and claiming this as a bug against the acpi_video stack. What sort of information would the ACPI folk like from me to help diagnose this? Here's a dmesg dump of all ACPI messages. http://pastebin.com/b4XKe5Fk Tom - Original Message - > From: "Daniel Vetter" > To: "Tom St Denis" > Cc: linux-kernel at vger.kernel.org, "intel-gfx" lists.freedesktop.org>, "dri-devel" > > Sent: Sunday, 2 December, 2012 9:42:39 AM > Subject: Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel > 915/Dell Vostro 3560) > > On Sun, Dec 2, 2012 at 2:49 PM, Tom St Denis > wrote: > > Ok so on v3.7-rc1 [and I suspect up] I can manually control the > > brightness by echoing to > > > > /sys/class/backlight/intel_backlight/brightness > > > > But I still can't use the buttons to control it (it only goes one > > tick down from max and stops there). I'm using GNOME3 from a > > x86_64 unstable debian install [up to date with latest]. > > > > I just noticed that under v3.7 I have a new directory > > /sys/class/backlight/acpi_video1 which is what GNOME is actually > > controlling. I can't disable ACPI video control so is there a > > workaround? > > Hah, acpi registered a broken backlight driver, which overwrites the > intel backlight - for once it's not i915.ko's fault ;-) For a > workaround either disable the acpi backlight with > acpi_backlight=vendor (iirc) kernel option or teach the X driver that > you want a different backlight driver in the xorg.conf (Option > "Backlight" "intel_backlight" should do the trick). > -Daniel > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch >
Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Ok so on v3.7-rc1 [and I suspect up] I can manually control the brightness by echoing to /sys/class/backlight/intel_backlight/brightness But I still can't use the buttons to control it (it only goes one tick down from max and stops there). I'm using GNOME3 from a x86_64 unstable debian install [up to date with latest]. I just noticed that under v3.7 I have a new directory /sys/class/backlight/acpi_video1 which is what GNOME is actually controlling. I can't disable ACPI video control so is there a workaround? Tom - Original Message - > From: "Daniel Vetter" > To: "Tom St Denis" > Cc: linux-kernel at vger.kernel.org, "intel-gfx" lists.freedesktop.org>, "dri-devel" > > Sent: Sunday, 2 December, 2012 6:43:14 AM > Subject: Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel > 915/Dell Vostro 3560) > > Including a bunch more lists to the cc. > > On Sun, Dec 2, 2012 at 12:42 PM, Daniel Vetter > wrote: > > On Sun, Dec 2, 2012 at 12:32 PM, Tom St Denis > > wrote: > >> I've narrowed it down to sometime between v3.6.8 and v3.7-rc1. So > >> none of the v3.7 series will work with this GPU/panel. > > > > Hm, that's still a few hundred relevant commits intermingled with a > > few thousand that likely don't matter ;-) Can you please attempt a > > kernel bisect with git? For a nice howto check out > > http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/ > > > > Also, can you please check which of the different backlight > > controls > > in /sys/class/backlight work on 3.6 (and whether any of them still > > work on 3.7)? > > > > Thanks, Daniel > > -- > > Daniel Vetter > > Software Engineer, Intel Corporation > > +41 (0) 79 365 57 48 - http://blog.ffwll.ch > > > > -- > Daniel Vetter > Software Engineer, Intel Corporation > +41 (0) 79 365 57 48 - http://blog.ffwll.ch >
Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Including a bunch more lists to the cc. On Sun, Dec 2, 2012 at 12:42 PM, Daniel Vetter daniel.vet...@ffwll.ch wrote: On Sun, Dec 2, 2012 at 12:32 PM, Tom St Denis tstde...@elliptictech.com wrote: I've narrowed it down to sometime between v3.6.8 and v3.7-rc1. So none of the v3.7 series will work with this GPU/panel. Hm, that's still a few hundred relevant commits intermingled with a few thousand that likely don't matter ;-) Can you please attempt a kernel bisect with git? For a nice howto check out http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/ Also, can you please check which of the different backlight controls in /sys/class/backlight work on 3.6 (and whether any of them still work on 3.7)? Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch ___ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
On Sun, Dec 2, 2012 at 2:49 PM, Tom St Denis tstde...@elliptictech.com wrote: Ok so on v3.7-rc1 [and I suspect up] I can manually control the brightness by echoing to /sys/class/backlight/intel_backlight/brightness But I still can't use the buttons to control it (it only goes one tick down from max and stops there). I'm using GNOME3 from a x86_64 unstable debian install [up to date with latest]. I just noticed that under v3.7 I have a new directory /sys/class/backlight/acpi_video1 which is what GNOME is actually controlling. I can't disable ACPI video control so is there a workaround? Hah, acpi registered a broken backlight driver, which overwrites the intel backlight - for once it's not i915.ko's fault ;-) For a workaround either disable the acpi backlight with acpi_backlight=vendor (iirc) kernel option or teach the X driver that you want a different backlight driver in the xorg.conf (Option Backlight intel_backlight should do the trick). -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch ___ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Ok so on v3.7-rc1 [and I suspect up] I can manually control the brightness by echoing to /sys/class/backlight/intel_backlight/brightness But I still can't use the buttons to control it (it only goes one tick down from max and stops there). I'm using GNOME3 from a x86_64 unstable debian install [up to date with latest]. I just noticed that under v3.7 I have a new directory /sys/class/backlight/acpi_video1 which is what GNOME is actually controlling. I can't disable ACPI video control so is there a workaround? Tom - Original Message - From: Daniel Vetter daniel.vet...@ffwll.ch To: Tom St Denis tstde...@elliptictech.com Cc: linux-ker...@vger.kernel.org, intel-gfx intel-...@lists.freedesktop.org, dri-devel dri-devel@lists.freedesktop.org Sent: Sunday, 2 December, 2012 6:43:14 AM Subject: Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560) Including a bunch more lists to the cc. On Sun, Dec 2, 2012 at 12:42 PM, Daniel Vetter daniel.vet...@ffwll.ch wrote: On Sun, Dec 2, 2012 at 12:32 PM, Tom St Denis tstde...@elliptictech.com wrote: I've narrowed it down to sometime between v3.6.8 and v3.7-rc1. So none of the v3.7 series will work with this GPU/panel. Hm, that's still a few hundred relevant commits intermingled with a few thousand that likely don't matter ;-) Can you please attempt a kernel bisect with git? For a nice howto check out http://www.reactivated.net/weblog/archives/2006/01/using-git-bisect-to-find-buggy-kernel-patches/ Also, can you please check which of the different backlight controls in /sys/class/backlight work on 3.6 (and whether any of them still work on 3.7)? Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch ___ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560)
Thanks Daniel so I'm taking back my bug report on the i915 and claiming this as a bug against the acpi_video stack. What sort of information would the ACPI folk like from me to help diagnose this? Here's a dmesg dump of all ACPI messages. http://pastebin.com/b4XKe5Fk Tom - Original Message - From: Daniel Vetter daniel.vet...@ffwll.ch To: Tom St Denis tstde...@elliptictech.com Cc: linux-ker...@vger.kernel.org, intel-gfx intel-...@lists.freedesktop.org, dri-devel dri-devel@lists.freedesktop.org Sent: Sunday, 2 December, 2012 9:42:39 AM Subject: Re: Brightness control fails between 3.6.8 and 3.7.0-rc7 (Intel 915/Dell Vostro 3560) On Sun, Dec 2, 2012 at 2:49 PM, Tom St Denis tstde...@elliptictech.com wrote: Ok so on v3.7-rc1 [and I suspect up] I can manually control the brightness by echoing to /sys/class/backlight/intel_backlight/brightness But I still can't use the buttons to control it (it only goes one tick down from max and stops there). I'm using GNOME3 from a x86_64 unstable debian install [up to date with latest]. I just noticed that under v3.7 I have a new directory /sys/class/backlight/acpi_video1 which is what GNOME is actually controlling. I can't disable ACPI video control so is there a workaround? Hah, acpi registered a broken backlight driver, which overwrites the intel backlight - for once it's not i915.ko's fault ;-) For a workaround either disable the acpi backlight with acpi_backlight=vendor (iirc) kernel option or teach the X driver that you want a different backlight driver in the xorg.conf (Option Backlight intel_backlight should do the trick). -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch ___ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
