[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-19 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #28 from Ilia Mirkin  ---
Obviously not the "right" fix, but you could probably get going by replacing

drivers/gpu/drm/nouveau/nvkm/subdev/devinit/gf100.c:.preinit =
gf100_devinit_preinit

with .preinit = nv50_devinit_preinit

which should get you back to the old logic for determining whether to run init
scripts or not.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #27 from Ilia Mirkin  ---
Looking at our VBIOS repo, we have a bunch (but not all) of GF104's that are
missing the 0x2240c write as well as one GK107. Every other (GF100+) GPU sets
0x2240c. I guess it's not as reliable as we'd hoped.

This is how I checked:

for i in nv[cdef]?/*/*.rom nv1??/*/*.rom; do echo $i; nvbios $i |& grep
0x02240c; done

And looked for files without a 'NV_REG   R[0x02240c] &= 0xfffd |=
0x0002' command.

Although that in itself shouldn't be a major issue - rerunning the VBIOS
shouldn't cause issues...

Looking at a mmiotrace that came with one of those GF104 VBIOSes that are
missing a 0x2240c write, it doesn't seem like the VBIOS gets executed there, or
at least not that script. It's late and I could have messed up though.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #26 from Ilia Mirkin  ---
0x13b154 = PXBAR.GPC_UNK1[0x2]+0x54

However GF104 only has 2 GPC's. Odd. At least the MMIO write failure makes
sense. I wonder if we're supposed to filter those out. That'd be pretty
annoying...

Another curious point is that this VBIOS does not write 0x2240c anywhere. I
wonder if that only got standardized later on, not starting with GF100.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #25 from Ilia Mirkin  ---
(In reply to Luke Tidd from comment #23)
> Created attachment 126611 [details]
> (broken) dmesg_4.7.4-1-ARCH nouveau.debug=debug,bios=trace

I am very confused by the lack of trace output for the bios execution. That
should have worked. It's clearly running the tables...

[1.960340] nouveau :01:00.0: devinit: running init tables

Secondly, one of your bios init scripts contains the command

0x8209: 7a 54 b1 13 00 02 00 00 00 ZM_REG   R[0x13b154] =
0x0002

in init script 3 (starting at 0x8116). This is the cause of

[4.108908] nouveau :01:00.0: bus: MMIO write of 0002 FAULT at
13b154 [ IBUS ]

However that is only reported when GT214_DISP is being initialized. Again, odd,
but I'm not 100% sure how the init scripts are executed. This might have to be
one for Ben...

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #24 from Luke Tidd  ---
Created attachment 126612
  --> https://bugs.freedesktop.org/attachment.cgi?id=126612&action=edit
vbios.rom

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #23 from Luke Tidd  ---
Created attachment 126611
  --> https://bugs.freedesktop.org/attachment.cgi?id=126611&action=edit
(broken) dmesg_4.7.4-1-ARCH nouveau.debug=debug,bios=trace

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #22 from Ilia Mirkin  ---
(In reply to Luke Tidd from comment #21)
> # stat /sys/kernel/debug/dri/0/vbios.rom
>   File: '/sys/kernel/debug/dri/0/vbios.rom'
>   Size: 0 Blocks: 0  IO Block: 4096   regular empty file
> Device: 7h/7d Inode: 13648   Links: 1
> Access: (0444/-r--r--r--)  Uid: (0/root)   Gid: (0/root)
> Access: 2016-09-18 23:52:15.396661809 -0400
> Modify: 2016-09-18 23:52:15.396661809 -0400
> Change: 2016-09-18 23:52:15.396661809 -0400
>  Birth: -
> 
> dri has /0 /64 and /128 and all vbios.rom in each are empty.

stat can be deceiving. Try cp or cat. (The vbios.rom files in all 3 should be
identical btw.)

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #21 from Luke Tidd  ---
# stat /sys/kernel/debug/dri/0/vbios.rom
  File: '/sys/kernel/debug/dri/0/vbios.rom'
  Size: 0   Blocks: 0  IO Block: 4096   regular empty file
Device: 7h/7d   Inode: 13648   Links: 1
Access: (0444/-r--r--r--)  Uid: (0/root)   Gid: (0/root)
Access: 2016-09-18 23:52:15.396661809 -0400
Modify: 2016-09-18 23:52:15.396661809 -0400
Change: 2016-09-18 23:52:15.396661809 -0400
 Birth: -

dri has /0 /64 and /128 and all vbios.rom in each are empty.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #20 from Ilia Mirkin  ---
(In reply to Luke Tidd from comment #18)
> https://bugs.freedesktop.org/attachment.cgi?id=126609
> I don't see "bios: running init tables" but here is the entire dmesg.

Indeed. So the "working" state is to not run the VBIOS. Something in there is
upsetting matters (normally running the VBIOS a second time doesn't hurt
anything, it's just pointless work and can cause a flicker). Assuming that
disabling vesafb doesn't help (the way those legacy interfaces are implemented
can be pretty brittle), please include

(a) /sys/kernel/debug/dri/0/vbios.rom (from any boot)
(b) nouveau.debug=debug,bios=trace output from a *broken* kernel boot

Ideally that should provide some further things to look at.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #19 from Luke Tidd  ---
Created attachment 126610
  --> https://bugs.freedesktop.org/attachment.cgi?id=126610&action=edit
4.5.0-rc7 nouveau.debug=debug video=vesafb:off log_buf_len=1M

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #18 from Luke Tidd  ---
(In reply to Ilia Mirkin from comment #12)
> (In reply to Luke Tidd from comment #11)
> > # first bad commit: [a6a0f67ca7aae2e6bec7ebf55d1e4853dc220816]
> > drm/nouveau/devinit/gf100-: detect if BIOS invoked devinit
> 
> That's interesting. It either used to run init tables and now doesn't, or
> conversely didn't use to and now does.
> 
> Would you mind running a "working" kernel with nouveau.debug=debug and see
> if it ever says "bios: running init tables"? If it does, you can probably
> make the new kernels work by adding nouveau.config=NvForcePost=1 . If it
> previously didn't run the tables and now does, there's no config-line way of
> overriding it.


https://bugs.freedesktop.org/attachment.cgi?id=126609
I don't see "bios: running init tables" but here is the entire dmesg.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #17 from Luke Tidd  ---
Created attachment 126609
  --> https://bugs.freedesktop.org/attachment.cgi?id=126609&action=edit
dmesg 4.5.0-rc7 nouveau.debug=debug log_buf_len=1M single

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #16 from Luke Tidd  ---
(In reply to Ilia Mirkin from comment #15)
> (In reply to Luke Tidd from comment #14)
> > kernel 4.7.4-1-ARCH
> > nomodeset single
> > 
> > # nvapeek 2240c
> > ...
> > 
> > 
> > testing working kernel now.
> 
> Hm, that means that the bit we're checking is 0, which indicates that the
> VBIOS hasn't run. This is, of course, patently false, since it seems like
> this is the only video card in the system, and it's working (right? you're
> at the console, the screen is on, etc?)
Yes, working, screen is on, this is the only video card.

> 
> And, I'm guessing, in the new kernel we're now running the vbios whereas we
> previously didn't use to. And running it a second time destroys the universe
> for some reason.
> 
> Separately, I just happened to notice that you have vesafb turned on. I
> wonder if this somehow upsets matters. Any chance you could flip that off?

Sure, just a sec

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #15 from Ilia Mirkin  ---
(In reply to Luke Tidd from comment #14)
> kernel 4.7.4-1-ARCH
> nomodeset single
> 
> # nvapeek 2240c
> ...
> 
> 
> testing working kernel now.

Hm, that means that the bit we're checking is 0, which indicates that the VBIOS
hasn't run. This is, of course, patently false, since it seems like this is the
only video card in the system, and it's working (right? you're at the console,
the screen is on, etc?)

And, I'm guessing, in the new kernel we're now running the vbios whereas we
previously didn't use to. And running it a second time destroys the universe
for some reason.

Separately, I just happened to notice that you have vesafb turned on. I wonder
if this somehow upsets matters. Any chance you could flip that off?

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #14 from Luke Tidd  ---
kernel 4.7.4-1-ARCH
nomodeset single

# nvapeek 2240c
...


testing working kernel now.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #13 from Ilia Mirkin  ---
Another thing you could do is boot (any) kernel with nomodeset, and then using
envytools (https://github.com/envytools/envytools/), do

nvapeek 2240c

This should output 1 line, either a number or just "..." [which means "0"], I
would like to know what it is. Ideally this would be done on a cold boot.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #12 from Ilia Mirkin  ---
(In reply to Luke Tidd from comment #11)
> # first bad commit: [a6a0f67ca7aae2e6bec7ebf55d1e4853dc220816]
> drm/nouveau/devinit/gf100-: detect if BIOS invoked devinit

That's interesting. It either used to run init tables and now doesn't, or
conversely didn't use to and now does.

Would you mind running a "working" kernel with nouveau.debug=debug and see if
it ever says "bios: running init tables"? If it does, you can probably make the
new kernels work by adding nouveau.config=NvForcePost=1 . If it previously
didn't run the tables and now does, there's no config-line way of overriding
it.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #11 from Luke Tidd  ---
You are right, sorry new to git bisect. Was thrown off by "0 more steps to do".



git bisect start '--' 'drivers/gpu/drm/nouveau'
# good: [b562e44f507e863c6792946e4e1b1449fbbac85d] Linux 4.5
git bisect good b562e44f507e863c6792946e4e1b1449fbbac85d
# bad: [523d939ef98fd712632d93a5a2b588e477a7565e] Linux 4.7
git bisect bad 523d939ef98fd712632d93a5a2b588e477a7565e
# bad: [3a91b9c5efd27729767edfde9df069aa61c4816f] drm/nouveau/clk/gk20a: fix
VCO bit mask
git bisect bad 3a91b9c5efd27729767edfde9df069aa61c4816f
# bad: [a2e435a1b0a3c2bc766d40356151610cc54b8772] drm/nouveau/fifo/gk104: take
runlist target into account
git bisect bad a2e435a1b0a3c2bc766d40356151610cc54b8772
# bad: [18cd5bc8ea587dc2fc0c07d2a4bf3cfe9ed2ef53] drm/nouveau/gr/gf100: load
firmware in outer function
git bisect bad 18cd5bc8ea587dc2fc0c07d2a4bf3cfe9ed2ef53
# good: [1b82111faebc24427c76b83738566bda7f315225] drm/nouveau/device/tegra:
fix uninitialized IRQ number
git bisect good 1b82111faebc24427c76b83738566bda7f315225
# bad: [989f57847396d1d042204747985d6aacf5399c8a] drm/nouveau/bios/devinit:
rename INIT_DP_CONDITION to INIT_GENERIC_CONDITION
git bisect bad 989f57847396d1d042204747985d6aacf5399c8a
# good: [8fb1240a7152d450d57402b5b85ba46d8610d443] drm/nouveau/devinit/nv50:
remove unneeded variable
git bisect good 8fb1240a7152d450d57402b5b85ba46d8610d443
# bad: [96aedd0ba9122a13fd0f756e022856ce7f05f086] drm/nouveau/ltc/gm107: fix
slice intr offset
git bisect bad 96aedd0ba9122a13fd0f756e022856ce7f05f086
# bad: [a6a0f67ca7aae2e6bec7ebf55d1e4853dc220816] drm/nouveau/devinit/gf100-:
detect if BIOS invoked devinit
git bisect bad a6a0f67ca7aae2e6bec7ebf55d1e4853dc220816
# first bad commit: [a6a0f67ca7aae2e6bec7ebf55d1e4853dc220816]
drm/nouveau/devinit/gf100-: detect if BIOS invoked devinit

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #10 from Ilia Mirkin  ---
(In reply to Luke Tidd from comment #9)
> Hi! Sorry that took so long. My other machine didn't have enough memory to
> run git bisect on the kernel.
> 
> 
> Here's the goods. Any change marked bad exhibited the exact same symptoms
> (monitor turns off shortly after boot).

Looks like you didn't finish? At the end it should say "commit XYZ is the first
bad commit"

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-18 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #9 from Luke Tidd  ---
Hi! Sorry that took so long. My other machine didn't have enough memory to run
git bisect on the kernel.


Here's the goods. Any change marked bad exhibited the exact same symptoms
(monitor turns off shortly after boot).

git bisect start '--' 'drivers/gpu/drm/nouveau'
# good: [b562e44f507e863c6792946e4e1b1449fbbac85d] Linux 4.5
git bisect good b562e44f507e863c6792946e4e1b1449fbbac85d
# bad: [523d939ef98fd712632d93a5a2b588e477a7565e] Linux 4.7
git bisect bad 523d939ef98fd712632d93a5a2b588e477a7565e
# bad: [3a91b9c5efd27729767edfde9df069aa61c4816f] drm/nouveau/clk/gk20a: fix
VCO bit mask
git bisect bad 3a91b9c5efd27729767edfde9df069aa61c4816f
# bad: [a2e435a1b0a3c2bc766d40356151610cc54b8772] drm/nouveau/fifo/gk104: take
runlist target into account
git bisect bad a2e435a1b0a3c2bc766d40356151610cc54b8772
# bad: [18cd5bc8ea587dc2fc0c07d2a4bf3cfe9ed2ef53] drm/nouveau/gr/gf100: load
firmware in outer function
git bisect bad 18cd5bc8ea587dc2fc0c07d2a4bf3cfe9ed2ef53
# good: [1b82111faebc24427c76b83738566bda7f315225] drm/nouveau/device/tegra:
fix uninitialized IRQ number
git bisect good 1b82111faebc24427c76b83738566bda7f315225
# bad: [989f57847396d1d042204747985d6aacf5399c8a] drm/nouveau/bios/devinit:
rename INIT_DP_CONDITION to INIT_GENERIC_CONDITION
git bisect bad 989f57847396d1d042204747985d6aacf5399c8a
# good: [8fb1240a7152d450d57402b5b85ba46d8610d443] drm/nouveau/devinit/nv50:
remove unneeded variable
git bisect good 8fb1240a7152d450d57402b5b85ba46d8610d443
# bad: [96aedd0ba9122a13fd0f756e022856ce7f05f086] drm/nouveau/ltc/gm107: fix
slice intr offset
git bisect bad 96aedd0ba9122a13fd0f756e022856ce7f05f086

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-07 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #8 from Luke Tidd  ---
FYI a newer kernel (linux-git 4.8rc4.r0.g3eab887-1) didn't help. I also knocked
my machine unreachable by trying to `git bisect` without specifying the
limiting path. I'll test more when I get home from work and can power cycle the
machine.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #7 from Ilia Mirkin  ---
Hrmph. Well it looks like your GPU just goes nuts.

[9.933619] nouveau :01:00.0: bus: MMIO write of 0002 FAULT at
13b154 [ IBUS ]
[9.936957] nouveau :01:00.0: bus: MMIO write of  FAULT at
61019c [ IBUS ]

followed by a ton more 610xxx errors. 610xxx is PDISPLAY stuff, but 13b154 is
in PXBAR.GPC_*. I also can't find any way that we'd be writing to that
register, at least nothing too direct. Something we do greatly upsets the chip
though.

I looked through the nouveau changes between 4.5 and 4.6, and while there was a
ton of stuff, nothing jumps out at me.

Can you do a git bisect on the kernel between v4.5 and v4.6 (you can restrict
it to drivers/gpu/drm/nouveau) to figure out which change killed it?

Separately, you could see if it magically got fixed in v4.7 or v4.8-rcN.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #6 from Luke Tidd  ---
Created attachment 126267
  --> https://bugs.freedesktop.org/attachment.cgi?id=126267&action=edit
lspci -v

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

Luke Tidd  changed:

   What|Removed |Added

 Attachment #126259|4.5.1-1-ARCH video working  |dmesg_4.5.1-1-ARCH video
description|flawlessly  |working flawlessly

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

Luke Tidd  changed:

   What|Removed |Added

 Attachment #126259|working kernel version  |4.5.1-1-ARCH video working
description||flawlessly

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

Luke Tidd  changed:

   What|Removed |Added

 Attachment #126260|0   |1
is obsolete||

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #5 from Luke Tidd  ---
Created attachment 126266
  --> https://bugs.freedesktop.org/attachment.cgi?id=126266&action=edit
dmesg_4.6.4-1-ARCH - in case you'd rather not bother with a realtime kernel

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #4 from Luke Tidd  ---
Of course. Sorry about that. PTAL

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #3 from Luke Tidd  ---
Created attachment 126262
  --> https://bugs.freedesktop.org/attachment.cgi?id=126262&action=edit
dmesg_4.6.7-rt11-2-rt (without nomodeset)

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #2 from Ilia Mirkin  ---
Your 4.6 kernel is being booted with 'nomodeset'. That disables the nouveau
kernel driver entirely.

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[Nouveau] [Bug 97620] [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)

2016-09-06 Thread bugzilla-daemon
https://bugs.freedesktop.org/show_bug.cgi?id=97620

--- Comment #1 from Luke Tidd  ---
Created attachment 126260
  --> https://bugs.freedesktop.org/attachment.cgi?id=126260&action=edit
newer kernel with regression (no video)

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