[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

Zhang Rui  changed:

   What|Removed |Added

 Status|REOPENED|RESOLVED
 Resolution|--- |INSUFFICIENT_DATA
   Assignee|acpi_power-video@kernel-bug |rui.zh...@intel.com
   |s.osdl.org  |

--- Comment #7 from Zhang Rui  ---
hmmm, bug closed as there is no response from the bug reporter.
Please feel free to
1. reopen it if the system is dead after resume
2. file a bug report at freedesktop if the system is still alive, but with a
black screen.

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[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

--- Comment #6 from Zhang Rui  ---
(In reply to Steven Stewart-Gallus from comment #5)
> So, I didn't make this clear but this is actually two problems that I
> originally thought were one. The first one is with the backlight and the
> second one is with the suspend and resume not working. When I suspend and
> the system resumes the display is completely off (not just the backlight.)

is the system still alive after resuming?
if yes, this still sounds like a graphics issue to me.

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[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

Steven Stewart-Gallus  changed:

   What|Removed |Added

 Status|CLOSED  |REOPENED
 Resolution|DOCUMENTED  |---

--- Comment #5 from Steven Stewart-Gallus  ---
So, I didn't make this clear but this is actually two problems that I
originally thought were one. The first one is with the backlight and the second
one is with the suspend and resume not working. When I suspend and the system
resumes the display is completely off (not just the backlight.)

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[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

Zhang Rui  changed:

   What|Removed |Added

 Status|NEEDINFO|CLOSED
 CC||rui.zh...@intel.com
 Resolution|--- |DOCUMENTED

--- Comment #4 from Zhang Rui  ---
As backlight sysfs I/F works, the problem you have sounds like a graphics issue
to me.
Please file a bug report at https://bugs.freedesktop.org/ instead.

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[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

--- Comment #3 from Steven Stewart-Gallus  ---
NVM. This seems to be just a problem with the desktop stack where sometimes it
can get into a state where it can't control the brightness.

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[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

--- Comment #2 from Steven Stewart-Gallus  ---
Changing the brightness to zero using the sysfs interface does not turn off the
display (you can still very slightly see the GUI on the laptop screen) and the
brightness can be set up and down again (using the sysfs interface) (bypassing
my desktop stack and using sysf directly seems to screw with the desktop and
make it stop working.) Is there a sysfs interface way to actually turn off the
screen and not just the backlight?

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[Bug 172251] Display Turns Off Permanently On Suspend - Intel GFX

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172251

Len Brown  changed:

   What|Removed |Added

 Status|NEW |NEEDINFO
 CC||l...@kernel.org
Summary|Display Turns Off   |Display Turns Off
   |Permanently On Suspend  |Permanently On Suspend -
   ||Intel GFX

--- Comment #1 from Len Brown  ---
Please try the sysfs interface to control backlight
and report if it behaves differently than using xbacklight:

/sys/class/backlight/*/brightness

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