| Message ID | 1373994495.9314.1.camel@x230 (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tuesday, July 16, 2013 05:08:16 PM Matthew Garrett wrote: > On Tue, 2013-07-16 at 17:32 +0400, Igor Gnatenko wrote: > > Hmm. I found regression in user-space. In GNOME (maybe and other DEs) we no longer see switch status of backlight. > > Yeah, I can duplicate that. Rafael, we have to call > acpi_video_init_brightness() even if we're not going to initialise the > backlight - Thinkpads seem to use this as the trigger for enabling ACPI > notifications rather than handling it in firmware. This seems to do the > job: Igor, does this additional patch from Matthew help? Rafael > diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c > index 01b1a25..71865f7 100644 > --- a/drivers/acpi/video.c > +++ b/drivers/acpi/video.c > @@ -900,6 +900,9 @@ static void acpi_video_device_find_cap(struct > acpi_video_device *device) > device->cap._DDC = 1; > } > > + if (acpi_video_init_brightness(device)) > + return; > + > if (acpi_video_verify_backlight_support()) { > struct backlight_properties props; > struct pci_dev *pdev; > @@ -909,9 +912,6 @@ static void acpi_video_device_find_cap(struct > acpi_video_device *device) > static int count = 0; > char *name; > > - result = acpi_video_init_brightness(device); > - if (result) > - return; > name = kasprintf(GFP_KERNEL, "acpi_video%d", count); > if (!name) > return; > > > -- > Matthew Garrett | mjg59@srcf.ucam.org >
On Wed, 2013-07-17 at 00:01 +0200, Rafael J. Wysocki wrote: > On Tuesday, July 16, 2013 05:08:16 PM Matthew Garrett wrote: > > On Tue, 2013-07-16 at 17:32 +0400, Igor Gnatenko wrote: > > > Hmm. I found regression in user-space. In GNOME (maybe and other DEs) we no longer see switch status of backlight. > > > > Yeah, I can duplicate that. Rafael, we have to call > > acpi_video_init_brightness() even if we're not going to initialise the > > backlight - Thinkpads seem to use this as the trigger for enabling ACPI > > notifications rather than handling it in firmware. This seems to do the > > job: > > Igor, does this additional patch from Matthew help? Yes. With this patch I have backlight switch indicator on my ThinkPad X230. > > Rafael > > Tested-by: Igor Gnatenko <i.gnatenko.brain@gmail.com> > > diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c > > index 01b1a25..71865f7 100644 > > --- a/drivers/acpi/video.c > > +++ b/drivers/acpi/video.c > > @@ -900,6 +900,9 @@ static void acpi_video_device_find_cap(struct > > acpi_video_device *device) > > device->cap._DDC = 1; > > } > > > > + if (acpi_video_init_brightness(device)) > > + return; > > + > > if (acpi_video_verify_backlight_support()) { > > struct backlight_properties props; > > struct pci_dev *pdev; > > @@ -909,9 +912,6 @@ static void acpi_video_device_find_cap(struct > > acpi_video_device *device) > > static int count = 0; > > char *name; > > > > - result = acpi_video_init_brightness(device); > > - if (result) > > - return; > > name = kasprintf(GFP_KERNEL, "acpi_video%d", count); > > if (!name) > > return; > > > > > > -- > > Matthew Garrett | mjg59@srcf.ucam.org > >
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 01b1a25..71865f7 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -900,6 +900,9 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) device->cap._DDC = 1; } + if (acpi_video_init_brightness(device)) + return; + if (acpi_video_verify_backlight_support()) { struct backlight_properties props;
On Tue, 2013-07-16 at 17:32 +0400, Igor Gnatenko wrote: > Hmm. I found regression in user-space. In GNOME (maybe and other DEs) we no longer see switch status of backlight. Yeah, I can duplicate that. Rafael, we have to call acpi_video_init_brightness() even if we're not going to initialise the backlight - Thinkpads seem to use this as the trigger for enabling ACPI notifications rather than handling it in firmware. This seems to do the job: struct pci_dev *pdev; @@ -909,9 +912,6 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device) static int count = 0; char *name; - result = acpi_video_init_brightness(device); - if (result) - return; name = kasprintf(GFP_KERNEL, "acpi_video%d", count); if (!name) return;