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[2/2] uxa: Mark the output as off before making pipe changes

Message ID 1403096497-7570-2-git-send-email-hdegoede@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Hans de Goede June 18, 2014, 1:01 p.m. UTC
This is a partial "backport" of commit c6cd10f536, which makes the same
change for sna, to avoid users still using uxa ending up with a blackscreen
after plugging in an external monitor.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 src/uxa/intel_display.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Chris Wilson June 18, 2014, 1:14 p.m. UTC | #1
On Wed, Jun 18, 2014 at 03:01:37PM +0200, Hans de Goede wrote:
> This is a partial "backport" of commit c6cd10f536, which makes the same
> change for sna, to avoid users still using uxa ending up with a blackscreen
> after plugging in an external monitor.
> 
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Do you want to reference your bugzilla here for background on the bug?
-Chris
Hans de Goede June 18, 2014, 1:50 p.m. UTC | #2
Hi,

On 06/18/2014 03:14 PM, Chris Wilson wrote:
> On Wed, Jun 18, 2014 at 03:01:37PM +0200, Hans de Goede wrote:
>> This is a partial "backport" of commit c6cd10f536, which makes the same
>> change for sna, to avoid users still using uxa ending up with a blackscreen
>> after plugging in an external monitor.
>>
>> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> 
> Do you want to reference your bugzilla here for background on the bug?

I wasn't sure, which is why I omitted it, but yes that probably makes sense,
please add these links to the commit msg:

https://bugzilla.redhat.com/show_bug.cgi?id=1032978
https://bugzilla.redhat.com/show_bug.cgi?id=1103806

Thanks,

Hans
Chris Wilson June 18, 2014, 2:02 p.m. UTC | #3
On Wed, Jun 18, 2014 at 03:50:45PM +0200, Hans de Goede wrote:
> Hi,
> 
> On 06/18/2014 03:14 PM, Chris Wilson wrote:
> > On Wed, Jun 18, 2014 at 03:01:37PM +0200, Hans de Goede wrote:
> >> This is a partial "backport" of commit c6cd10f536, which makes the same
> >> change for sna, to avoid users still using uxa ending up with a blackscreen
> >> after plugging in an external monitor.
> >>
> >> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> > 
> > Do you want to reference your bugzilla here for background on the bug?
> 
> I wasn't sure, which is why I omitted it, but yes that probably makes sense,
> please add these links to the commit msg:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=1032978
> https://bugzilla.redhat.com/show_bug.cgi?id=1103806

Added, and pushed. Thanks a lot for tracking down the cause of this one,
-Chris
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Patch

diff --git a/src/uxa/intel_display.c b/src/uxa/intel_display.c
index e00b9c2..a745dc5 100644
--- a/src/uxa/intel_display.c
+++ b/src/uxa/intel_display.c
@@ -320,6 +320,14 @@  intel_crtc_apply(xf86CrtcPtr crtc)
 		xf86OutputPtr output = xf86_config->output[i];
 		struct intel_output *intel_output;
 
+		/* Make sure we mark the output as off (and save the backlight)
+		 * before the kernel turns it off due to changing the pipe.
+		 * This is necessary as the kernel may turn off the backlight
+		 * and we lose track of the user settings.
+		 */
+		if (output->crtc == NULL)
+			output->funcs->dpms(output, DPMSModeOff);
+
 		if (output->crtc != crtc)
 			continue;