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Enable Internal display when disconnecting from Dockingstation

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hackatos said:
On restart with lid closed.

Code: 
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::probe()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::findDevices()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::hasBacklightMethods()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: ACPI device PNLF has _BCL
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: ACPI device PNLF has XBCM/XBQC
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: PNLF has backlight Methods
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklight: ACPI Methods _DOS _BCL _BCM _BQC found. Device path: _SB.PCI0.IGPU.PNLF
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: probe(devices found : true)
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: PNLF has backlight Methods
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::start()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::findDevices()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::getDeviceControl()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: BIOS control disabled: _DOS
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::hasSAVEMethod()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::setupIndexedLevels()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::queryACPISupportedBrightnessLevels()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: PNLF _BCL 67
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: findIndexForLevel(1808) is 63
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: findIndexForLevel(479) is 31
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::loadFromNVRAM()
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: no /chosen/nvram, trying IODTNVRAM
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: read level from nvram = 0
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: loadFromNVRAM returns 0
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: findIndexForLevel(0) is 0
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: current brightness: 0 (0)
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: setting to value from nvram 0
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(0)
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklightPanel: min = 0, max = 64
8/19/15 7:49:43.000 PM kernel[0]: ACPIBacklight: Version 3.0.3
Click to expand...

Your NVRAM has stored backlight level 0.

Please provide details on how you managed to store 0 to NVRAM acpi-backlight-level.

If NVRAM shows 0, it sets backlight to black because of this scenario:

- attach external monitor
- leave laptop lid open
- turn backlight to black by pressing brightness down until internal screen is off
- use external monitor when using laptop
- shutdown
- restart (with external monitor still connected)

result: backlight level on internal display is still black on restart as expected.

So... I cannot ignore a zero backlight level if you set it that way.

If saved value of NVRAM backlight is getting set to zero some other way, let me know what the steps to reproduce it are, and the ACPIBacklight debug logs for it.
 
RehabMan said:
- attach external monitor
- leave laptop lid open
- turn backlight to black by pressing brightness down until internal screen is off
- use external monitor when using laptop
- shutdown
- restart (with external monitor still connected)
Click to expand...

I tested the scenario above and got the expected results.
After that, turned on on the internal screen with the brightness keys, closed the lid.
Code: 
8/20/15 7:44:45.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 0)
8/20/15 7:44:45.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(0)
8/20/15 7:44:45.000 PM kernel[0]: ACPIBacklightPanel::processWorkQueue() _workPending=3
8/20/15 7:44:46.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 0)
8/20/15 7:44:46.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(0)

Rebooted with lid closed while still connected to external monitor.
Tried to open the lid again.
Code: 
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setDisplay()
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 255)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(1024)
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bklt", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("rgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("ggsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("gsc ", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("vblm", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("commit", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("flush", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::processWorkQueue() _workPending=3
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bklt", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("rgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("ggsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("gsc ", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("vblm", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("commit", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("flush", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::processWorkQueue() _workPending=3
 
hackatos said:
I tested the scenario above and got the expected results.
After that, turned on on the internal screen with the brightness keys, closed the lid.
Code: 
8/20/15 7:44:45.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 0)
8/20/15 7:44:45.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(0)
8/20/15 7:44:45.000 PM kernel[0]: ACPIBacklightPanel::processWorkQueue() _workPending=3
8/20/15 7:44:46.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 0)
8/20/15 7:44:46.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(0)
Click to expand...

Looks normal.

Rebooted with lid closed while still connected to external monitor.
Tried to open the lid again.
Code: 
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setDisplay()
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 255)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(1024)
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bklt", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("rgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("ggsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("gsc ", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("vblm", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("commit", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("flush", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::processWorkQueue() _workPending=3
8/20/15 8:31:39.000 PM kernel[0]: enter ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: exit ACPIBacklightPanel::doUpdate()
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("brightness", 1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::setBrightnessLevelSmooth(1024)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bklt", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("rgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("ggsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("bgsc", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("gsc ", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("vblm", 65536)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("commit", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::doIntegerSet("flush", 0)
8/20/15 8:31:39.000 PM kernel[0]: ACPIBacklightPanel::processWorkQueue() _workPending=3
Click to expand...

Brightness was last set to max (1024).
 
RehabMan said:
Brightness was last set to max (1024).
Click to expand...
Before closing the lid and restarting.
After booting up with the lid closed, I opened again the lid and the screen remains black, brightness control is working but internal screen doesn't turn on.
 
hackatos said:
Before closing the lid and restarting.
Click to expand...

??? Strange sentence.

After booting up with the lid closed, I opened again the lid and the screen remains black, brightness control is working but internal screen doesn't turn on.
Click to expand...

According to the logs you provide, not an ACPIBacklight.kext issue as it shows brightness being set to 1024.

Issue is something else.

Not sure what you mean by "brightness control is working but internal screen doesn't turn on.". Seems like a contradiction.
 
RehabMan said:
Not sure what you mean by "brightness control is working but internal screen doesn't turn on.". Seems like a contradiction.
Click to expand...
I mean, I can see brightness changes while the screen remains black (desktop doesn't show).
 
hackatos said:
I mean, I can see brightness changes while the screen remains black (desktop doesn't show).
Click to expand...

Not a backlight problem then. More like a graphics driver/frame buffer issue.
 
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