Bug 24810

Summary:	TTM out of aperture space, X lockup
Product:	xorg	Reporter:	aeriksson
Component:	Driver/nouveau	Assignee:	Nouveau Project <nouveau>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	major
Priority:	medium	CC:	glisse, thomas
Version:	unspecified
Hardware:	x86 (IA32)
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description aeriksson 2009-10-30 02:24:16 UTC

Afer an upgrade to xorg-server-1.7.0.902 and latest git for the kernel and 
xorg nouveau drivers I cannot start x with kms under wmaker. As root (just twm 
and an xterm) it's ok.

Dmesg shows:
 [drm] DAC-6: set mode 1680x1050 1a
[drm] nouveau 0000:01:00.0: nv04_dac_mode_set called for encoder 0
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on CRTC 0
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Output VGA-1 is running on CRTC 0 using output @
[drm] Initialized nouveau 0.0.15 20090420 for 0000:01:00.0 on minor 0
[drm] nouveau 0000:01:00.0: Setting dpms mode 1 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on CRTC 0
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Allocating FIFO number 1
[drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 1
[drm] nouveau 0000:01:00.0: nouveau_channel_free: freeing fifo 1
[drm] nouveau 0000:01:00.0: Allocating FIFO number 1
[drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 1
[TTM] Failed moving buffer. Proposed placement 0x00070004
[TTM] Out of aperture space or DRM memory quota.
[drm] nouveau 0000:01:00.0: nouveau_channel_free: freeing fifo 1
[drm] nouveau 0000:01:00.0: Setting dpms mode 3 on CRTC 0

and the display is powered off. At this point I need to ssh to the machine as 
reboot it.

If I don't use kms, I can start wmaker just fine:
Linux agpgart interface v0.103
agpgart-intel 0000:00:00.0: Intel 440BX Chipset
agpgart-intel 0000:00:00.0: AGP aperture is 64M @ 0xe8000000
[drm] Initialized drm 1.1.0 20060810
[drm] nouveau 0000:01:00.0: Detected an NV4 generation card (0x20154000)
[drm] Initialized nouveau 0.0.15 20090420 for 0000:01:00.0 on minor 0
[TTM] Zone  kernel: Available graphics memory: 221064 kiB.
[drm] nouveau 0000:01:00.0: 16 MiB VRAM
agpgart-intel 0000:00:00.0: AGP 1.0 bridge
agpgart-intel 0000:00:00.0: putting AGP V2 device into 2x mode
[drm] nouveau 0000:01:00.0: 64 MiB GART (aperture)
[drm] nouveau 0000:01:00.0: Allocating FIFO number 0
[drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 0
[drm] nouveau 0000:01:00.0: Allocating FIFO number 1
[drm] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 1

Comment 1 Pauli 2010-01-28 10:17:45 UTC

Very similar TTM bug happens with radeon driver which is reported at https://bugs.launchpad.net/bugs/507148.

Short description:
Starting X with mobility radeon 7500 in system with 64M GTT and less than 32M VRAM may cause TTM placement move fail because the target is full. (placement hint: 0x00060004)

Comment 2 Lucas Stach 2011-02-15 03:20:17 UTC

I think this could be fixed by 
http://cgit.freedesktop.org/nouveau/linux-2.6/commit/?id=78ad0f7bf2bb667729581f099781fc0b7ae58fcc

But I am not entirely sure. Could someone with more insight into this things than me comment on this, please?

Comment 3 aeriksson 2011-02-15 06:42:30 UTC

I'm the original reporter of this bug. If memory serves, there was a patch floated (and committed) shortly after I raised the byg. The card worked fine since then using mainline code, but it died physically 6 months ago so I cannot do any testing of new stuff for you.

Comment 4 Lucas Stach 2011-02-15 09:55:43 UTC

Ok, so we could consider this as fixed. Thank you for your reply.

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