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Old 10-17-07, 03:48 AM   #1
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Join Date: Oct 2007
Location: Confoederatio Helvetica
Posts: 530
Default Brightness control not working with nVidia driver

With my IBM/Lenovo R61 with an integrated
nVIDIA Quadro NVS 140M the display brightness control
does not work in X11 with the nVidia driver loaded,
even if NVreg_EnableBrightnessControl=1 is set.

The brightness control works with nv or vesa drivers and works on the VT.

I am using the latest 100.14.19 nvidia driver with gentoo amd64.

The thinkpad and gentoo wikis mention this bug as known,
however, I haven't found this bug on this forum.

Is there a solution for this problem?

Thanks in advance,


additional information:

fuchs@thinkfox ~ $ cat /proc/driver/nvidia/registry
VideoMemoryTypeOverride: 1
EnableVia4x: 0
EnableALiAGP: 0
NvAGP: 3
ReqAGPRate: 15
EnableAGPSBA: 0
EnableAGPFW: 0
SoftEDIDs: 1
Mobile: 4294967295
ResmanDebugLevel: 4294967295
FlatPanelMode: 0
DevicesConnected: 0
RmLogonRC: 1
VbiosFromROM: 0
ModifyDeviceFiles: 1
DeviceFileUID: 0
DeviceFileGID: 27
DeviceFileMode: 432
RemapLimit: 0
UseCPA: 4294967295
DetectPrimaryVga: 1
EnableBrightnessControl: 1
PanelPWMFrequency: 1018
PanelBrightnessLimits: 65280
UseVBios: 1
RMEdgeIntrCheck: 1

fuchs@thinkfox ~ $ lspci | grep VGA
01:00.0 VGA compatible controller: nVidia Corporation Unknown device 0429 (rev a1)
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