[Nouveau] "Unknown LVDS configuration bits, please report"

[Stefan Welte]

When booting arch linux on laptop Dell Latitude D800, there is displayed following in one of the first
ten lines.
"[Nouveau] "Unknown LVDS configuration bits, please report""

[root at arch ~]# dmesg | grep nouveau
[    0.848209] nouveau  [  DEVICE][0000:01:00.0] BOOT0  : 0x028600a2
[    0.848219] nouveau  [  DEVICE][0000:01:00.0] Chipset: NV28 (NV28)
[    0.848223] nouveau  [  DEVICE][0000:01:00.0] Family : NV20
[    0.943984] nouveau  [   VBIOS][0000:01:00.0] using image from PRAMIN
[    0.943990] nouveau  [   VBIOS][0000:01:00.0] BMP version 5.25
[    0.944245] nouveau  [   VBIOS][0000:01:00.0] version 04.28.20.29.00
[    0.944596] nouveau W[  PTIMER][0000:01:00.0] unknown input clock freq
[    0.944611] nouveau  [     PFB][0000:01:00.0] RAM type: SDRAM
[    0.944615] nouveau  [     PFB][0000:01:00.0] RAM size: 32 MiB
[    0.944619] nouveau  [     PFB][0000:01:00.0]    ZCOMP: 49152 tags
[    0.953634] nouveau  [     CLK][0000:01:00.0] --:   
[    0.954573] nouveau  [     DRM] VRAM: 31 MiB
[    0.954580] nouveau  [     DRM] GART: 128 MiB
[    0.954586] nouveau  [     DRM] BMP version 5.37
[    0.954591] nouveau  [     DRM] DCB version 2.2
[    0.954597] nouveau  [     DRM] DCB outp 00: 01000100 000088b8
[    0.954602] nouveau  [     DRM] DCB outp 01: 02110223 00000064
[    0.954606] nouveau E[     DRM] Unknown LVDS configuration bits, please report
[    0.954671] nouveau  [     DRM] DCB outp 02: 01120312 00000040
[    0.954675] nouveau  [     DRM] DCB outp 03: 01130321 00000001
[    0.954906] nouveau  [     DRM] BIOS FP mode: 1401x1050 (108000kHz pixel clock)
[    0.955519] nouveau  [     DRM] Saving VGA fonts
[    1.078678] nouveau  [     I2C][0000:01:00.0] detected TV encoder: ch7006
[    1.085641] nouveau  [     DRM] MM: using M2MF for buffer copies
[    1.085656] nouveau  [     DRM] Calling LVDS script 1:
[    1.085662] nouveau  [     DRM] Calling LVDS script 6:
[    1.085667] nouveau  [     DRM] 0xDFB9: Parsing digital output script table
[    1.750067] nouveau  [     DRM] allocated 1280x800 fb: 0x9000, bo c1d35800
[    1.750224] fbcon: nouveaufb (fb0) is primary device
[    1.775575] nouveau  [     DRM] Calling LVDS script 6:
[    1.775579] nouveau  [     DRM] 0xDFB9: Parsing digital output script table
[    2.345670] nouveau  [     DRM] Calling LVDS script 2:
[    2.345673] nouveau  [     DRM] 0xDFE7: Parsing digital output script table
[    2.361688] nouveau  [     DRM] Calling LVDS script 5:
[    2.361691] nouveau  [     DRM] 0xDF32: Parsing digital output script table
[    2.575451] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device
[    2.575455] nouveau 0000:01:00.0: registered panic notifier
[    2.575467] [drm] Initialized nouveau 1.2.2 20120801 for 0000:01:00.0 on minor 0
                                                                         
[   48.555989] nouveau  [     DRM] Calling LVDS script 6:
                                                                                                   
[   48.556007] nouveau  [     DRM] 0xDFB9: Parsing digital output script table
                                                                              
[   49.147809] nouveau  [     DRM] Calling LVDS script 2:
                                                                                                   
[   49.147821] nouveau  [     DRM] 0xDFE7: Parsing digital output script table
                                                                              
[   49.163847] nouveau  [     DRM] Calling LVDS script 5:
                                                                                                   
[   49.163857] nouveau  [     DRM] 0xDF32: Parsing digital output script table
[ 1912.308991] nouveau  [     DRM] Calling LVDS script 6:
[ 1912.309010] nouveau  [     DRM] 0xDFB9: Parsing digital output script table
[25984.472247] nouveau  [     DRM] Calling LVDS script 2:
[25984.472264] nouveau  [     DRM] 0xDFE7: Parsing digital output script table
[25984.488292] nouveau  [     DRM] Calling LVDS script 5:
[25984.488302] nouveau  [     DRM] 0xDF32: Parsing digital output script table
[26728.392302] nouveau  [     DRM] Calling LVDS script 6:
[26728.392321] nouveau  [     DRM] 0xDFB9: Parsing digital output script table
[26910.142617] nouveau  [     DRM] Calling LVDS script 2:
[26910.142635] nouveau  [     DRM] 0xDFE7: Parsing digital output script table
[26910.158661] nouveau  [     DRM] Calling LVDS script 5:
[26910.158672] nouveau  [     DRM] 0xDF32: Parsing digital output script table

[root at arch ~]# lspci -kn|grep -A 3 ^01
01:00.0 0300: 10de:0286 (rev a1)
        Subsystem: 1028:0179