mactel-support team mailing list archive

[Gabe <gabe@xxxxxxxxxxxxxx>]

LCD backlight is controlled by Intel GMA HD on Sony Vaio ZPC1

** Changed in: mactel-support
       Status: New => Invalid

** Converted to question:
   https://answers.launchpad.net/mactel-support/+question/105848

-- 
nvidia-bl-dkms 0.16.5: Cannot adjust backlight on Sony Vaio / GT330M [Karmic]
https://bugs.launchpad.net/bugs/545698
You received this bug notification because you are a member of Mactel
Support, which is the registrant for Mactel Support.

Status in Mactel Support: Invalid

Bug description:
I'm not sure if this is a bug or just there is no support yet for my system.
I have a Sony Vaio Z1190, Core i7, Hybrid graphics Intel Arrandale/nVidia GT 330M.  I am running Ubuntu 9.10 Karmic AMD64, kernel version 2.6.31-20-generic, nVidia drivers 195.36.15.

lspci -vv output:
01:00.0 VGA compatible controller: nVidia Corporation Device 0a2b (rev a2)
	Subsystem: Sony Corporation Device 905a
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0
	Interrupt: pin A routed to IRQ 16
	Region 0: Memory at b2000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at a0000000 (64-bit, prefetchable) [size=256M]
	Region 3: Memory at b0000000 (64-bit, prefetchable) [size=32M]
	Region 5: I/O ports at 6000 [size=128]
	[virtual] Expansion ROM at b3080000 [disabled] [size=512K]
	Capabilities: [60] Power Management version 3
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
		Address: 0000000000000000  Data: 0000
	Capabilities: [78] Express (v2) Endpoint, MSI 00
		DevCap:	MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 <64us
			ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
			MaxPayload 128 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
		LnkCap:	Port #0, Speed 5GT/s, Width x16, ASPM L0s L1, Latency L0 <256ns, L1 <4us
			ClockPM+ Suprise- LLActRep- BwNot-
		LnkCtl:	ASPM L0s L1 Enabled; RCB 128 bytes Disabled- Retrain- CommClk+
			ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
	Capabilities: [b4] Vendor Specific Information <?>
	Capabilities: [100] Virtual Channel <?>
	Capabilities: [128] Power Budgeting <?>
	Capabilities: [600] Vendor Specific Information <?>
	Kernel driver in use: nvidia
	Kernel modules: nvidia, nvidiafb

I try booting 'noapic acpi_backlight=vendor', unload or blacklist the sony-laptop module (which also fails to adjust the backlight, ditto the acpi video module, additionally I have tried to add the "EnableBrightnessControl=1" to Xorg.org), then when I adjust the backlight either via keyboard or directly with /sys/class/backlight/nvidia_backlight/brightness, the system believes it has made the change but no effect is seen.

Here is the effect to the kernel of nvidia-bl running 'debug=1' and changing backlight to 0:
gabe@vaio:/sys/class/backlight/nvidia-backlight$ dmesg|grep nvidia
[    6.442172] nvidia: module license 'NVIDIA' taints kernel.
[    6.708785] nvidia 0000:01:00.0: power state changed by ACPI to D0
[    6.708802] nvidia 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    6.708811] nvidia 0000:01:00.0: setting latency timer to 64
[  103.380870] nvidia_bl: Nvidia graphics adapter 10de:0a2b (104d:905a) detected
[  103.380876] nvidia_bl: using BAR #0 at 0xb2000000, smartdimmer at 0xb261c084
[  103.381004] nvidia_bl: register mask: 0x000007ff
[  103.381008] nvidia_bl: setting brightness to 2047
[  103.381010] nvidia_bl: register write: 0x800007ff
[  181.310867] nvidia_bl: setting brightness to 0
[  181.310872] nvidia_bl: register write: 0x80000000
[  212.364832] nvidia_bl: register read: 0x00000000
[  212.364837] nvidia_bl: read brightness of 0

Please let me know if there is any more info that could help you to help me out.  Thanks!