framebuffer with nvidia 7600GS shows corrupt screen

framebuffer with nvidia 7600GS shows corrupt screen

[jurriaan]

I've swapped my nvidia 6600 for a 7600GS, because it has dual-link DVI
output. That broke my framebuffer!

If I boot like this:

Command line: root=/dev/md2 video=nvidiafb:640x480-32@60 atkbd.softrepeat=1

I see this:

nvidiafb: Device ID: 10de0392 
nvidiafb: CRTC0 analog found
nvidiafb: CRTC1 analog not found
nvidiafb: EDID found from BUS1
i2c-adapter i2c-1: unable to read EDID block.
i2c-adapter i2c-1: unable to read EDID block.
i2c-adapter i2c-1: unable to read EDID block.
nvidiafb: CRTC 0 appears to have a CRT attached
nvidiafb: Using CRT on CRTC 0
nvidiafb: MTRR set to ON
Console: switching to colour frame buffer device 64x26
nvidiafb: PCI nVidia NV39 framebuffer (64MB @ 0xC0000000)

But the screen is unreably corrupted. I can describe the corruption as
follows:

The two penguins I normally see are about the correct size, but shown in
dark grey lines on a black background. All characters are also composed
of these dark grey lines - with black lines inbetween. The entire screen
is very faintly visible, all is dark grey on black.

The monitor does receive the correct signal (my Eizo's on-screen menu
shows a 60 Hz signal coming in).

In case anybody is wondering about the resolution - normally I boot
1600x1200, but that also doesn't work. Xorg works fine, so it must be
something in the framebuffer, right?

xorg's version:
ii  xserver-xorg-video-nv 1:2.0.2-1 X.Org X server -- NV display driver

output of lspci:

01:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce 7600 GS] (rev a1) (prog-if 00 [VGA])
	Subsystem: Micro-Star International Co., Ltd. Unknown device 0413
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0, Cache Line Size: 32 bytes
	Interrupt: pin A routed to IRQ 18
	Region 0: Memory at d0000000 (32-bit, non-prefetchable) [size=16M]
	Region 1: Memory at c0000000 (64-bit, prefetchable) [size=256M]
	Region 3: Memory at d1000000 (64-bit, non-prefetchable) [size=16M]
	Region 5: I/O ports at a000 [size=128]
	[virtual] Expansion ROM at d2000000 [disabled] [size=128K]
	Capabilities: [60] Power Management version 2
		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 Endpoint IRQ 0
		Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag-
		Device: Latency L0s <1us, L1 <4us
		Device: AtnBtn- AtnInd- PwrInd-
		Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported-
		Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+
		Device: MaxPayload 128 bytes, MaxReadReq 512 bytes
		Link: Supported Speed 2.5Gb/s, Width x16, ASPM L0s L1, Port 0
		Link: Latency L0s <1us, L1 <4us
		Link: ASPM Disabled RCB 128 bytes CommClk- ExtSynch-
		Link: Speed 2.5Gb/s, Width x16
	Capabilities: [100] Virtual Channel
	Capabilities: [128] Power Budgeting

output of fbset:


(C) Copyright 1995-1999 by Geert Uytterhoeven

Opening frame buffer device `/dev/fb0'
Using current video mode from `/dev/fb0'

mode "640x480-60"
    # D: 25.200 MHz, H: 31.500 kHz, V: 60.001 Hz
    geometry 640 480 640 25990 32
    timings 39682 48 16 33 10 96 2
    accel true
    rgba 8/16,8/8,8/0,8/24
endmode

Any hints on what to do? The mainboard is an Asus A8N-SLI, with X2 4600
processor and 4 Gb ram - not too uncommon.

Kind regards,
Jurriaan
-- 
There are 3 kinds of people: those who can count & those who can't.
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Re: framebuffer with nvidia 7600GS shows corrupt screen

[thunder7]

From: Petr Vandrovec <vandrove@vc.cvut.cz>
Date: Thu, May 24, 2007 at 01:57:16AM -0700
> jurriaan wrote:
> >I've swapped my nvidia 6600 for a 7600GS, because it has dual-link DVI
> >output. That broke my framebuffer!
> >
> >If I boot like this:
> >
> >Command line: root=/dev/md2 video=nvidiafb:640x480-32@60 atkbd.softrepeat=1
> >
> >I see this:
> >
> >nvidiafb: Device ID: 10de0392 
> >nvidiafb: CRTC0 analog found
> >nvidiafb: CRTC1 analog not found
> >nvidiafb: EDID found from BUS1
> 
> Mmm, and what you have connected to that dual-link DVI output?  It looks 
> like that framebuffer believes that you've connected analog monitor to 
> it, which I'm not sure is quite correct given your note that you 
> upgraded to get dual link DVI.  You may want to hardcode values for 
> FlatPanel & CRTCNumber into NVCommonSetup instead of allowing 
> autodetection...

I haven't yet - a plain old CRT monitor is attached currently. I haven't
bought a LCD yet. The messages seem correct. The monitor is attached via
a dvi->vga15 converter, of which I've tried two known working ones.

Thanks,
Jurriaan
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+        * this makes the year come out right.
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+#endif
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Re: framebuffer with nvidia 7600GS shows corrupt screen

[thunder7]

From: thunder7@xs4all.nl <thunder7@xs4all.nl>
Date: Thu, May 24, 2007 at 02:36:11PM +0200
> 
> I haven't yet - a plain old CRT monitor is attached currently. I haven't
> bought a LCD yet. The messages seem correct. The monitor is attached via
> a dvi->vga15 converter, of which I've tried two known working ones.
> 
So far, I've determined the problem also happens when I boot a 32-bit
system, and it goes partly away when I add the noaccel option.

If I add noaccel, I get a dark grey background, with very dark gray or
black letters on it. It's readable if you can guess what is written,
like boot messages.

xorg works fine (using the nv driver), and the strange part:

once I've switched from Xorg to a console (ctrl-alt-F1), the console
looks fine. Also, if I leave X11 after having switched to a console and
back to Xorg, the console looks fine.

I hope this jogs someone's memory - I basically trying blind. Anyone
care to guess what goes wrong? I didn't think the 7600 was such an
exotic card...

Kind regards,
Jurriaan
-- 
For who are we to question her
Who stands among the stones
	Big Country - The Seer
Debian (Unstable) GNU/Linux 2.6.21-mm2 2x2010 bogomips load 2.21
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Re: framebuffer with nvidia 7600GS shows corrupt screen

[Antonino A. Daplas]

On Wed, 2007-05-23 at 20:18 +0200, jurriaan wrote:
> I've swapped my nvidia 6600 for a 7600GS, because it has dual-link DVI
> output. That broke my framebuffer!

I haven't sync'ed nvidiafb with xorg's nv driver, so your chipset is not
properly supported yet. I'll send you a patch when it's ready.

Tony



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