[Nouveau] nouveaufb problems with NV18

[younes.m at gmail.com]

On , George Spelvin <linux at horizon.com> wrote:
> I have an NV18 (GeForce4 MX) connected via DVI to a 1920x1080 LCD,

> and when I try to use the nouveau kernel driver, I get a crappy display.



> Thanks in advance to anyone who can help.



> I'm running a recent nouveau git (fa17f241 drm/nv50: fix thinko in vm  
> fault)

> merged with 2.6.38-rc8.



> When the driver loads (it's compiled as a module, so this is after init

> starts), the console shrinks to a 36x90 character box in the upper-left

> corner of the display.



> When the system is busy, the screen "flashes" to the right.

> The console text appears half a screen to the right for a moment.

> It's particularly annoying right after boot, but settles down once the

> system goes quescent.



> The problem is NOT associated with screen updates. I can run "yes"

> and see the problem very little. hdparm -tT, however, makes the screen

> almost unusable during *both* phases.



> Watching during heavy activity, there's a "standard position" to the

> right where the text tends to appear, but there's also lots of "tearing"

> and it appears in multiple positions. Still pretty recognizable as text,

> though; it doesn't seem to change every scanline.



> X is also screwed up; it fails to start with the messages:

> [ 214.714] (II) NOUVEAU(0): Opened GPU channel 1

> [ 214.715] (II) NOUVEAU(0): [DRI2] Setup complete

> [ 214.715] (II) NOUVEAU(0): [DRI2] DRI driver: nouveau_vieux

> [ 214.716] (EE) NOUVEAU(0): Error allocating scanout buffer: 0

> [ 214.716]

> Fatal server error:

> [ 214.716] AddScreen/ScreenInit failed for driver 0



> ... but I figure that's a more advanced problem.



> I've tried and been unhappy with the nouveau driver on this system in

> the past (I remember it coming up but having lots of horizontal lines of

> "snow" on the display), but Debian recently removed the nv driver that

> worked fine for me from its X distribution, so I'm trying again a bit

> harder this time.



> It's a 2 GB Athlon system, small form factor with onboard video.

> lspci -nn gives:

Is there anything at all connected to the other output (referred to as TV-1  
in your log)? You can try disabling TV detection with the tv_disable  
nouveau.ko module parameter if a non-existent TV is somehow being detected.
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