Nouveau - Sep 2010 - [Bug 30086] New: Nouveau fails with unreadable EDID

https://bugs.freedesktop.org/show_bug.cgi?id=30086

           Summary: Nouveau fails with unreadable EDID
           Product: xorg
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: alci at mecadu.org
         QAContact: xorg-team at lists.x.org


On a Sony VPCCW2S1E laptop, EDID seems to be somehow unreadable:

get-edid: get-edid version 2.0.0
 Performing real mode VBE call
 Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
 Function supported
 Call successful

 VBE version 300
 VBE string at 0x11100 "NVIDIA"

VBE/DDC service about to be called
 Report DDC capabilities

 Performing real mode VBE call
 Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
 Function supported
 Call successful

 Monitor and video card combination does not support DDC1 transfers
 Monitor and video card combination does not support DDC2 transfers
 0 seconds per 128 byte EDID block transfer
 Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
 Read EDID

 Performing real mode VBE call
 Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
 Function supported
 Call failed

The EDID data should not be trusted as the VBE call failed
Error: output block unchanged


Video card is a GT 330 M:

01:00.0 VGA compatible controller: nVidia Corporation GT216 [GeForce GT 330M]
(rev a2) (prog-if 00 [VGA controller])
    Subsystem: Sony Corporation Device 9072
    Flags: bus master, fast devsel, latency 0, IRQ 16
    Memory at e2000000 (32-bit, non-prefetchable) [size=16M]
    Memory at d0000000 (64-bit, prefetchable) [size=256M]
    Memory at e0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at d000 [size=128]
    Expansion ROM at e3000000 [disabled] [size=512K]
    Capabilities: <access denied>
    Kernel driver in use: nvidia
    Kernel modules: nvidia-current, nouveau, nvidiafb


When loading, nouveau driver can't find the laptop's LCD screen, and
display is
black.
Notice that proprietary NVidia driver has the same problem, but it offers a
workaround with the customEDID option:

Option "CustomEDID" "DFP-0:/etc/X11/SNY05FA.bin"


Nouveau does not seem to have such an option... Is there a workaround for
nouveau? Or is there a way to find why the EDID cannot be read?

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--- Comment #1 from Ben Skeggs <skeggsb at gmail.com> 2010-09-08 05:37:15
PDT ---
Can you post your dmesg log from after loading the nouveau driver please?

Nouveau should be able to find your EDID if you're using new enough code.

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--- Comment #2 from alci at mecadu.org 2010-09-08 07:25:04 PDT ---
Created an attachment (id=38551)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38551)
xorg log when using nouveau driver

Here is the output of xorg when using nouveau.

(by using nouveau in the device section of xorg.conf. If no xorg.conf, seems to
fallback to fbdev).

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--- Comment #3 from Ben Skeggs <skeggsb at gmail.com> 2010-09-09 02:36:20
PDT ---
Can I see your kernel log please (/var/log/messages or "dmesg" after a
failed
attempt at using nouveau).

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--- Comment #4 from alci at mecadu.org 2010-09-09 10:03:23 PDT ---
There is not much in /var/log/messages after a failed attempt... If I change
xorg.conf from nv to nouveau, then logout from gnome, gdm will fail to start.

At that time, I have nothing added in /var/log/messages.
In /var/log/syslog, I get:

Sep  9 18:52:27 franck-laptop gdm-binary[23109]: WARNING: GdmDisplay: display
lasted 0,230001 seconds
Sep  9 18:52:27 franck-laptop gdm-binary[23109]: WARNING:
GdmLocalDisplayFactory: maximum number of X display failures reached: check X
server log for errors

In /var/log/Xorg.0.log, I get the same messages as in the attachment I made,
ending with:

[   339.439] (EE) [drm] failed to open device
[   339.439] (EE) No devices detected.

Is there any other log I can provide ?

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--- Comment #5 from walt <w41ter at gmail.com> 2010-09-09 11:53:58 PDT ---
(In reply to comment #4)
> [   339.439] (EE) [drm] failed to open device
> [   339.439] (EE) No devices detected.
I got that error too at first.  The device it's looking for is
crw-rw---- 1 root video 226, 0 2010-09-09 06:39 /dev/dri/card0

In my case that device wasn't created during boot until I added
console framebuffer support in the kernel. CONFIG_FRAMEBUFFER_CONSOLE=y

After I made that change, then I could see that the nouveau fb
driver takes over the console during early bootup -- and that
(somehow) prods udev into creating the missing device.

There may be an alternative way to do the same thing but I don't
know how to do it.  (Hints welcomed.)

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--- Comment #6 from Pekka Paalanen <pq at iki.fi> 2010-09-09 14:10:31 PDT
---
(In reply to comment #5)
> In my case that device wasn't created during boot until I added
> console framebuffer support in the kernel. CONFIG_FRAMEBUFFER_CONSOLE=y
Why would you *not* have fbcon=y? Without fbcon, you will not have a text
console at all with Nouveau.
> After I made that change, then I could see that the nouveau fb
> driver takes over the console during early bootup -- and that
> (somehow) prods udev into creating the missing device.
That is a little odd trigger for it, but still just an unrelated theoretical
issue of the case when someone wants to have graphics but not a console.


To the original poster:

You were asked to provide a complete kernel log from boot up to the original
failure. Do not filter it, do not interpret it, do not compress it. Without the
log you cannot be helped.

It is almost as if you do not have KMS enabled (or Nouveau installed properly).
The log will show the cause. When Nouveau loads, it will print many lines to
the kernel log at kernel module init time, before X starts.

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--- Comment #7 from walt <w41ter at gmail.com> 2010-09-09 15:32:40 PDT ---
(In reply to comment #6)
> (In reply to comment #5)
> > In my case that device wasn't created during boot until I added
> > console framebuffer support in the kernel.
CONFIG_FRAMEBUFFER_CONSOLE=y
> 
> Why would you *not* have fbcon=y? Without fbcon, you will not have a text
> console at all with Nouveau.
Now I remember.  My mistake was building fbcon as a module.  When I changed
it to built-in then everything started working correctly.

Before I figured it all out, I loaded the fbcon module from a blank console
screen before starting X -- thus getting the missing device error mentioned by
the OP.

If there's a way to shoot yourself in the foot -- I promise to find it :)

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--- Comment #8 from Ben Skeggs <skeggsb at gmail.com> 2010-09-09 15:40:54
PDT ---
(In reply to comment #4)
> There is not much in /var/log/messages after a failed attempt... If I
change
> xorg.conf from nv to nouveau, then logout from gnome, gdm will fail to
start.
> 
> At that time, I have nothing added in /var/log/messages.
> In /var/log/syslog, I get:
> 
> Sep  9 18:52:27 franck-laptop gdm-binary[23109]: WARNING: GdmDisplay:
display
> lasted 0,230001 seconds
> Sep  9 18:52:27 franck-laptop gdm-binary[23109]: WARNING:
> GdmLocalDisplayFactory: maximum number of X display failures reached: check
X
> server log for errors
> 
> In /var/log/Xorg.0.log, I get the same messages as in the attachment I
made,
> ending with:
> 
> [   339.439] (EE) [drm] failed to open device
> [   339.439] (EE) No devices detected.
> 
> Is there any other log I can provide ?
I need to see your dmesg output (or /var/log/messages) from nouveau trying to
start *without* "nomodeset" (so, you'll get a blank screen because
nouveau
can't read your edid) in order to better diagnose the problem.

"failed to open device" is probably because you were trying to use
nouveau
without kernel modesetting enabled.

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--- Comment #9 from alci at mecadu.org 2010-09-13 00:39:44 PDT ---
Ok, here I come with the requested log files. Sorry for being tough on this :-)

1) with no xorg.conf, let X11 auto-configure:

dmesg-noxorg.txt
Xorg.noxorg.log

works but fallback to vesa (output is quite bad)

2) with a xorg.conf using nv driver

dmesg-xorg-nv.txt
Xorg.nv.log

Works (but no 3D of course)

3) with a xorg.conf using nouveau driver

dmesg-xorg-nouveau.txt
Xorg.nouveau.log

Fails, X won't start.

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--- Comment #10 from alci at mecadu.org 2010-09-13 00:40:17 PDT ---
Created an attachment (id=38661)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38661)
No xorg

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--- Comment #11 from alci at mecadu.org 2010-09-13 00:41:07 PDT ---
Created an attachment (id=38662)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38662)
Xorg.0.log no xorg.conf

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--- Comment #12 from alci at mecadu.org 2010-09-13 00:41:33 PDT ---
Created an attachment (id=38663)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38663)
dmesg nv

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--- Comment #13 from alci at mecadu.org 2010-09-13 00:42:02 PDT ---
Created an attachment (id=38664)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38664)
xorg.0.log nv

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--- Comment #14 from alci at mecadu.org 2010-09-13 00:42:34 PDT ---
Created an attachment (id=38665)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38665)
dmesg nouveau

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--- Comment #15 from alci at mecadu.org 2010-09-13 00:43:02 PDT ---
Created an attachment (id=38666)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38666)
Xorg.0.log nouveau

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alci at mecadu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #38661|No xorg                     |dmesg no xorg
        description|                            |

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--- Comment #16 from Marcin Slusarz <marcin.slusarz at gmail.com>
2010-09-13 06:15:33 PDT ---
In all 3 cases you had nvidia proprietary driver (both kernel and userspace).
Uninstall it and try again.

You should not see this in kernel log:
"NVRM: loading NVIDIA UNIX x86_64 Kernel Module"

and this in xorg.0.log:
Module glx: vendor="NVIDIA Corporation"

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--- Comment #17 from alci at mecadu.org 2010-09-13 08:07:40 PDT ---
Ok, I have removed all previously installed proprietary NVidia drivers. I have
removed any xorg.conf file from the way, and here are my dmesg and Xorg.0.log
files.
Display is black, no X, no console.

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--- Comment #18 from alci at mecadu.org 2010-09-13 08:08:33 PDT ---
Created an attachment (id=38669)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38669)
dmesg after removing nvidia install, no xorg.conf

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alci at mecadu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #38551|0                           |1
        is obsolete|                            |
  Attachment #38661|0                           |1
        is obsolete|                            |
  Attachment #38662|0                           |1
        is obsolete|                            |
  Attachment #38663|0                           |1
        is obsolete|                            |
  Attachment #38664|0                           |1
        is obsolete|                            |
  Attachment #38665|0                           |1
        is obsolete|                            |
  Attachment #38666|0                           |1
        is obsolete|                            |

--- Comment #19 from alci at mecadu.org 2010-09-13 08:09:21 PDT ---
Created an attachment (id=38670)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38670)
Xorg.0.log after removing nvidia install, no xorg.conf

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--- Comment #20 from Ben Skeggs <skeggsb at gmail.com> 2010-09-13 15:32:37
PDT ---
OK, Your laptop is one of those weirdo Sony laptops that don't provide EDID
in
any normal way.  This has been implemented in Nouveau upstream, but your
distribution appears not to ship it.

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--- Comment #21 from alci at mecadu.org 2010-09-14 02:47:00 PDT ---
Thanks Ben. This seems like a good news to me!

May I ask if there is an easy way to test latest nouveau driver, ala
'compat-wireless' ?

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--- Comment #22 from Pekka Paalanen <pq at iki.fi> 2010-09-14 07:12:12 PDT
---
(In reply to comment #21)
> May I ask if there is an easy way to test latest nouveau driver, ala
> 'compat-wireless' ?
Yes, sort of, the out-of-tree build:
http://nouveau.freedesktop.org/wiki/InstallDRM
It may require you to upgrade your kernel, anyway.

You can find that page via Nouveau wiki front page -> Installing (compiling
and
using Nouveau) -> Step 2, the kernel modules.

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #23 from Marcin Slusarz <marcin.slusarz at gmail.com>
2011-02-10 09:12:05 PST ---
(In reply to comment #20)
> OK, Your laptop is one of those weirdo Sony laptops that don't provide
EDID in
> any normal way.  This has been implemented in Nouveau upstream, but your
> distribution appears not to ship it.
Marking as FIXED.

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alci at mecadu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |

--- Comment #24 from alci at mecadu.org 2011-02-24 06:13:21 PST ---
I just tried latest (alpha) ubuntu, that ships with nouveau driver
git20110107(+b795ca6e).

But I now get this error:

[drm] nouveau Pointer to BIT loadval table invalid

So unless this is some other unrelated error showing up, the fix does not seem
to work (here).

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alci at mecadu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #25 from alci at mecadu.org 2011-03-11 21:44:13 PST ---
Last upgrade did fix the issue for me. As I was the initial reporter and the
problem was supposed to be resolved, I close it again.
Many thanks to all.

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