When you say two first buttons? Which are you talking?

I've not bothered trying to get the slide-bar working, although it would be nice if it did, waiting for my Windows 7 disks where it will work, although I'm really not booting into windows much at all these days.

I mean the dolby button and the one on the left of it.

I installed windows7and I plan on trying to reverse engeneer the drivers when I have the time (which will probably be on dec or jan).

Also, I installed cpufreq to control the cpu frequency when I am on batteries, and it can go as low as 800Mhz. Which makes the batteries last longer.I

I just received my Y450 and I am having the same problem.  I think I can get it to work by modifying the scripts provided by elektropionir based on the setpci commands provided by dsides.  I just need to know how the register "F4.B" was determined.  Thanks in advance.

Details:

The problem I am having is that

sudo setpci -s 00:02.0 F4.B=20

 will not work for me because the the device address on my computer is 

01:00.0 VGA compatible controller: nVidia Corporation Device 0a34 (rev a2)

 Changing the command to

sudo setpci -s 01:00.0 F4.B=20

 does nothing.    The result of 

sudo lspci -vvvxxx -s 01:00.0

 is

01:00.0 VGA compatible controller: nVidia Corporation Device 0a34 (rev a2)
	Subsystem: Lenovo Device 38fd
	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 cc000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at d0000000 (64-bit, prefetchable) [size=256M]
	Region 3: Memory at ce000000 (64-bit, prefetchable) [size=32M]
	Region 5: I/O ports at 2000 [size=128]
	[virtual] Expansion ROM at cd000000 [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 x1, 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
00: de 10 34 0a 07 00 10 00 a2 00 00 03 00 00 80 00
10: 00 00 00 cc 0c 00 00 d0 00 00 00 00 0c 00 00 ce
20: 00 00 00 00 01 20 00 00 00 00 00 00 aa 17 fd 38
30: 00 00 00 00 60 00 00 00 00 00 00 00 0a 01 00 00
40: aa 17 fd 38 00 00 00 00 00 00 00 00 00 00 00 00
50: 01 00 00 00 01 00 00 00 ce d6 23 00 00 00 00 00
60: 01 68 03 00 08 00 00 00 05 78 80 00 00 00 00 00
70: 00 00 00 00 00 00 00 00 10 b4 02 00 e0 8d 2c 01
80: 10 29 00 00 02 2d 05 00 4b 01 11 10 00 00 00 00
90: 00 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00
a0: 00 00 00 00 00 00 00 00 02 00 00 00 00 00 00 00
b0: 00 00 00 00 09 00 14 01 00 00 00 00 00 00 00 00
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

The same problem as constanthatz described.

Author! We need your help :)

Here is some information about the thinkpad acpi, but I do not know about applicability to ideapads. In any case, I can't configure backlight.

I've found a trick! But it is not a solution actually.

You can change the brightness in tty.

1) Press "Ctrl + Alt + F1"

2) Wait until you see a login invitation

3) Change the brightness!

4) Press "Ctrl + Alt + F7" to go back to XServer.

5) PROFIT!!

Hi guys am a user of Lenovo y450 p7450 w/ 512mb nvidia graphics .. On winxp en win7 theres no problem i encountered only in Linux which its HANG everytime I install the driver of NVIDIA..I tried Ubuntu, Fedora, Linuxmint en now last Im using is Sabayon. All OS i tried i suffer from hanging w/c is "Ctrl + Alt + F1" en ctrl + Alt + F7  is effective but there's couple of times its hang again, ..i check some forums but didnt help,, I consult my friend said that wait for latest version of Ubuntu this summer...Can u help me guys ..

lennyC2,

Do you mean to say that Nvidia's  drivers freezes your system?

@ ●๋•víjáýکáŕádhí کámávểdámツ

tnx for reply ,,sorry for the PM Im a newbies en not familiar with this. Yeah I think so!!!! my friend w/c is a ubuntu user dont know how to fix it..So I decided to raise it here..

I think you can try using the alternative of nvidia for your distribution.

http://nouveau.freedesktop.org/wiki/InstallNouveau