intelfb with 855GME and DVI?

intelfb with 855GME and DVI?

[Matthew Hodgson]

Hi,

I have an obscure Pentium M motherboard with 855GME graphics 
(http://www.ibase-i.com.tw/mb890.htm) which I'm trying to use with a DVI 
monitor for video playback.  On compiling intelfb into 2.6.20, the fb 
fails to load with a boot option of video=intelfb:1024x768-24@75 with

intelfb: intelfb_init
intelfb: Framebuffer driver for Intel(R) 830M/845G/852GM/855GM/865G/915G/915GM/945G/945GM chipsets
intelfb: Version 0.9.4
intelfb: intelfb_setup
intelfb: options: 1024x768-24@75
intelfb: intelfb_pci_register
intelfb: fb aperture: 0xd8000000/0x8000000, MMIO region: 0xec080000/0x80000
intelfb: 00:02.0: Intel(R) 855GME, aperture size 128MB, stolen memory 32636kB
intelfb: fb: 0xd8000000(+ 0x0)/0x1fdf000 (0xde980000)
intelfb: MMIO: 0xec080000/0x80000 (0xe3980000)
intelfb: ring buffer: 0xdb001000/0x10000 (0xe1981000)
intelfb: HW cursor: 0x0/0x0 (0x00000000) (offset 0x0) (phys 0x0)
intelfb: options: vram = 4, accel = 1, hwcursor = 0, fixed = 0, noinit = 0
intelfb: options: mode = "1024x768-24@75"
intelfb: Non-CRT device is enabled ( DVO port C ).  Disabling mode switching.
intelfb: Video mode must be programmed at boot time.
intelfb: cleanup

I'm confused: I thought that I /was/ trying to program the video mode at 
boot time by specifying the video= boot option.  Or is this trying to tell 
me that there's actually no support of Non-CRT at all?  Specifying vga= 
options in lilo.conf and disabling/enabling vesafb doesn't seem to alter 
the behaviour.

Should this work?

thanks,

Matthew.

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Re: intelfb with 855GME and DVI?

[Dave Airlie]

>
> I have an obscure Pentium M motherboard with 855GME graphics
> (http://www.ibase-i.com.tw/mb890.htm) which I'm trying to use with a DVI
> monitor for video playback.  On compiling intelfb into 2.6.20, the fb
> fails to load with a boot option of video=intelfb:1024x768-24@75 with
>
> intelfb: intelfb_init
> intelfb: Framebuffer driver for Intel(R) 830M/845G/852GM/855GM/865G/915G/915GM/945G/945GM chipsets
> intelfb: Version 0.9.4
> intelfb: intelfb_setup
> intelfb: options: 1024x768-24@75
> intelfb: intelfb_pci_register
> intelfb: fb aperture: 0xd8000000/0x8000000, MMIO region: 0xec080000/0x80000
> intelfb: 00:02.0: Intel(R) 855GME, aperture size 128MB, stolen memory 32636kB
> intelfb: fb: 0xd8000000(+ 0x0)/0x1fdf000 (0xde980000)
> intelfb: MMIO: 0xec080000/0x80000 (0xe3980000)
> intelfb: ring buffer: 0xdb001000/0x10000 (0xe1981000)
> intelfb: HW cursor: 0x0/0x0 (0x00000000) (offset 0x0) (phys 0x0)
> intelfb: options: vram = 4, accel = 1, hwcursor = 0, fixed = 0, noinit = 0
> intelfb: options: mode = "1024x768-24@75"
> intelfb: Non-CRT device is enabled ( DVO port C ).  Disabling mode switching.
> intelfb: Video mode must be programmed at boot time.
> intelfb: cleanup
>
> I'm confused: I thought that I /was/ trying to program the video mode at
> boot time by specifying the video= boot option.  Or is this trying to tell
> me that there's actually no support of Non-CRT at all?  Specifying vga=
> options in lilo.conf and disabling/enabling vesafb doesn't seem to alter
> the behaviour.
>
> Should this work?

No, there is no support for non-crt devices in intelfb...

Dave.

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Re: intelfb with 855GME and DVI?

[Marcus Better]

Dave Airlie wrote:
> No, there is no support for non-crt devices in intelfb...

Does that mean that a laptop display (Thinkpad) won't work either?

Marcus



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Re: intelfb with 855GME and DVI?

[Alex Deucher]

On 2/13/07, Marcus Better <marcus@better.se> wrote:
> Dave Airlie wrote:
> > No, there is no support for non-crt devices in intelfb...
>
> Does that mean that a laptop display (Thinkpad) won't work either?
>

correct.

Alex

> Marcus
>
>

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Re: intelfb with 855GME and DVI?

[Marcus Better]

Alex Deucher wrote:

>> Does that mean that a laptop display (Thinkpad) won't work either?
> 
> correct.

Well, that explains my problems then. :-)

Shouldn't this be documented somewhere (like in Kconfig or
Documentation/fb/intelfb.txt), or am I missing something obvious?

And didn't the i810fb driver work with laptops?

Marcus



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Re: intelfb with 855GME and DVI?

[Dave Airlie]

>
> >> Does that mean that a laptop display (Thinkpad) won't work either?
> >
> > correct.
>
> Well, that explains my problems then. :-)
>
> Shouldn't this be documented somewhere (like in Kconfig or
> Documentation/fb/intelfb.txt), or am I missing something obvious?
>
> And didn't the i810fb driver work with laptops?

No idea, I doubt it somehow, as there is no code to control the
external devices in either codebase, maybe i810 worked for some
reason,

maybe it should be documented, it does print it out when you boot that
it can't change the mode on non-CRT hardware..

Dave.

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