Nouveau - Jan 2013 - [Bug 57350] [nouveau, linux-3.7-rc] Broken cursor and kernel log swamped with trapped reads/writes from BAR/PFIFO_READ/FB

https://bugs.freedesktop.org/show_bug.cgi?id=57350

--- Comment #7 from Parag <parag.warudkar at gmail.com> ---
This affects my MacBookPro6,2 with GT330 GPU as well. Exact same symptoms and
error messages as the reporter. Last working kernel for me is 3.5.0-17 Ubuntu.
I have tried 3.7.4 and various 3.8 rc releases and both show the same issue.

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Mourad De Clerck <bugs-freedesktop at aquazul.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugs-freedesktop at aquazul.co
                   |                            |m

--- Comment #8 from Mourad De Clerck <bugs-freedesktop at aquazul.com> ---
This also affects my MacbookPro7,1 with an MCP89 (NVAF)

The same symptoms: the middle of the cursor is transparent, and if I proceed to
login directly (Gnome 3), it locks up eventually.

One difference is the reason: VRAM_LIMIT instead of PAGE_NOT_PRESENT. The
channel and address range seem to match the original submitter's dmesg.

The workaround to suspend and resume also seems to work for me too on 3.7.

It started happening from 3.7 onwards. I tried 3.8-rc4, and the bug's still
there (however resume doesn't work on 3.8-rc4, probably something else
wrong).

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--- Comment #9 from alzeih at gmail.com ---
Created attachment 73708
  --> https://bugs.freedesktop.org/attachment.cgi?id=73708&action=edit
zcat /proc/config.gz > config

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--- Comment #10 from alzeih at gmail.com ---
Also happens on my MacBookPro6,2

lspci -nn | grep VGA:

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT216 [GeForce GT
330M] [10de:0a29] (rev a2)

from dmesg:

[ 1678.891945] nouveau E[     PFB][0000:01:00.0] trapped read at 0x00007139c0
on channel 0x0001fed0 BAR/PFIFO_READ/FB reason: PAGE_NOT_PRESENT

Workaround mentioned with suspend/resume also works for me.

Running kernel config attached.

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--- Comment #11 from Ankur <ankur at lipidity.com> ---
I also have this issue on a MacBook5,1

Bottom half of mouse cursor is transparent.

There are thousands of "trapped read at ... on channel ...
BAR/PFIFO_READ/FB
reason: PAGE_NOT_PRESENT" with occasional "trapped write"s.

All issues resolve after resuming from suspend.

Running Arch Linux (kernel 3.7.5 x86_64)
xf86-video-nouveau 1.0.6
xorg-server 1.12.2
libdrm 2.4.41

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--- Comment #12 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Created attachment 74513
  --> https://bugs.freedesktop.org/attachment.cgi?id=74513&action=edit
limit pmem to 64kB

does it change anything?

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--- Comment #13 from Bruno <bonbons67 at internet.lu> ---
(In reply to comment #12)
> Created attachment 74513 [details] [review]
> limit pmem to 64kB
> 
> does it change anything?
No change for me (applied on top of linux-3.7.6, MacBookPro(2,1)).

The error seems very much related to the cursor itself.
Errors are only generated on cursor move/change.

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #74513|0                           |1
        is obsolete|                            |

--- Comment #14 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Created attachment 74545
  --> https://bugs.freedesktop.org/attachment.cgi?id=74545&action=edit
initialize pmem offset

what about this one?

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--- Comment #15 from Bruno <bonbons67 at internet.lu> ---
(In reply to comment #14)
> Created attachment 74545 [details] [review]
> initialize pmem offset
> 
> what about this one?
No change with this one (instead of the previous one) either.


Now as well as since the bug appeared there is sporadically a write error
between the many ready errors. (same error message but s/read/write/)

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--- Comment #16 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Just to be sure we are not chasing two different bugs - can you confirm
3863c9bc887e9638a9d905d55f6038641ece78d6 is the commit which introduced *this*
bug?

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--- Comment #17 from Bruno <bonbons67 at internet.lu> ---
(In reply to comment #16)
> Just to be sure we are not chasing two different bugs - can you confirm
> 3863c9bc887e9638a9d905d55f6038641ece78d6 is the commit which introduced
> *this* bug?
I can't quickly check, both 3863c9bc887e9638a9d905d55f6038641ece78d6 and
preceding 8a9b889e668a5bc2f4031015fe4893005c43403d don't compile here (gcc
4.6.3).

They are failing on redeclaration of NV_* enums in nouveau_drv.h which were
previously declared in core/include/core/device.h and struct nouveau_engine
which was previously declared in core/include/core/engine.h

Will look tomorrow evening (CET) at GIT history around those commits in order
to get it compiling so I can check.

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--- Comment #18 from Bruno <bonbons67 at internet.lu> ---
I checked at commit aa4cc5d274c09909fe32861825c2377d0ccb3bfd and the bug is not
yet present.

I checked at commit 9274f4a9ba7e70d1770e237fca16d52f27f0c728 and the bug is not
yet present.

Kernel does not build starting with commit
9458029940ffc64bca0c5a30ea626c377205842e (fails on the redeclarations mentioned
in comment #17).

Commit 77145f1cbdf8d28b46ff8070ca749bad821e0774 is the first one to build again
and is affected by the bug.


The duplicate NV_* enum may be easy to fix though the struct nouveau_engine
seems harder to correct.

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--- Comment #19 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Weird, 3863c9bc887e9638a9d905d55f6038641ece78d6 compiles fine here on both gcc
4.7.2 and 4.6.3. Can you attach compile log?

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--- Comment #20 from Bruno <bonbons67 at internet.lu> ---
Created attachment 74862
  --> https://bugs.freedesktop.org/attachment.cgi?id=74862&action=edit
Kernel config + compile log for 3863c9bc887e9638a9d905d55f6038641ece78d6

This includes the build log for rebuilding (trying to) kernel after touching
all files under drivers/gpu/drm/nouveau.

The kernel config preceeds the build log in the same file.

For the whole range of commits where compilation fails the errors are the same
though I did not take extra care to check if it was always failing for the same
source files.

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--- Comment #21 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Created attachment 74935
  --> https://bugs.freedesktop.org/attachment.cgi?id=74935&action=edit
compilation fix

I'm not sure why I can't hit it, but this patch will probably resolve
your
compilation problem...

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--- Comment #22 from Bruno <bonbons67 at internet.lu> ---
(In reply to comment #21)
> Created attachment 74935 [details] [review]
> compilation fix
> 
> I'm not sure why I can't hit it, but this patch will probably
resolve your
> compilation problem...
The patch does not fix compilation for me.

Are you building in-tree or out-of-tree?
I'm building out-of-tree.

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--- Comment #23 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
in-tree

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--- Comment #24 from Bruno <bonbons67 at internet.lu> ---
It seems that there is a fix for this issue in nouveau/master tough that kernel
stalls on click to open menu in enlightenment 0.17.1 [compositing enabled]...

And once the stall has happened, the GPU seems rather confused, OSX wont
successfully start anymore and older Linux kernels show incorrectly tiled
content with nouveau (nouveaufb) while EFIFB gets things displayed as usual.

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--- Comment #25 from Marcin Slusarz <marcin.slusarz at gmail.com> ---
Note that one recent commit in xf86-video-nouveau
(http://cgit.freedesktop.org/nouveau/xf86-video-nouveau/commit/?id=912d418fdfd2e99eef1e5c631c76dda1d82cf451)
may reduce visibility of this bug... Did you update xf86-video-nouveau too?

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--- Comment #26 from Bruno <bonbons67 at internet.lu> ---
(In reply to comment #23)
> in-tree
Yes, compiling in-tree does work... so includes search paths somehow are broken
between those two revisions I mentioned in comment #18 when building
out-of-tree. Not so good.

(In reply to comment #25)
> Note that one recent commit in xf86-video-nouveau
> (912d418fdfd2e99eef1e5c631c76dda1d82cf451) may reduce visibility of this
> bug... Did you update xf86-video-nouveau too?
No, I just updated kernel. For userspace I'm still on
xf86-video-nouveau-1.0.4,
libdrm-2.4.40, mesa-9.0.1 and xorg-server-1.13.1
The nouveau/master commit I tried was 43b629c047... (drm/nouveau: Fix DPMS 1 on
G4 Snowball, from snow white to coal black) by Stefan de Konink.

(In reply to comment #16)
> Just to be sure we are not chasing two different bugs - can you confirm
> 3863c9bc887e9638a9d905d55f6038641ece78d6 is the commit which introduced
> *this* bug?
Bug present in 3863c9bc887e9638a9d905d55f6038641ece78d6.
Bug not present in preceding 8a9b889e668a5bc2f4031015fe4893005c43403d.

So yes, I can confirm.

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