[Bug 98149] New: EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

[Bug 98149] New: EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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https://bugs.freedesktop.org/show_bug.cgi?id=98149

            Bug ID: 98149
           Summary: EDID doesn't detect resolution 1440x900 correctly NV34
                    FX5200Go
           Product: xorg
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
          Reporter: dino-fd97jBR+K/4TdH58SC1qeg@public.gmane.org
        QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

Created attachment 127102
  --> https://bugs.freedesktop.org/attachment.cgi?id=127102&action=edit
Dmesg log

I have an older laptop Toshiba P25-S609 which has NV34 based graphics (NVIDIA
FX5200Go). With 4.2 kernel and lower (and possibly 4.3) native resolution
1440x900 is detected properly. With 4.4 kernel and newer (e.g. Xubuntu 16.04.1
and newer) image on screen is displayed really weird. It is split in 4 parts,
and then it is shown from right to left (inverted). With xrandr --newmode and
cvt 1440 900 I can set the resolution, but then tty is still messed up.
I have tried to get the bug with options drm.debug=0x1e nouveau.debug=debug,
and vbios.rom from /sys/kernel/debug/dri/0/ and it is here: 
http://filebin.ca/2xexyy0VGT9L/vbios.rom

Here is the image of what it does look like: 
http://imgur.com/a/ZUi0j 

Dmesg log is attached below.

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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https://bugs.freedesktop.org/show_bug.cgi?id=98149

--- Comment #1 from Dino <dino-fd97jBR+K/4TdH58SC1qeg@public.gmane.org> ---
Created attachment 127104
  --> https://bugs.freedesktop.org/attachment.cgi?id=127104&action=edit
vbios rom

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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https://bugs.freedesktop.org/show_bug.cgi?id=98149

--- Comment #2 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Looks like the included EDID in the VBIOS is:

00000000  00 ff ff ff ff ff ff 00  2e 0d 00 00 00 00 00 00  |................|
00000010  04 09 01 02 80 00 00 00  e2 00 00 00 00 00 00 00  |................|
00000020  00 00 00 00 08 00 01 01  01 01 01 01 01 01 01 01  |................|
00000030  01 01 01 01 01 01 64 19  00 40 41 00 26 30 18 88  |......d..@A.&0..|
00000040  36 00 00 00 00 00 00 18  00 00 00 00 00 00 00 00  |6...............|
00000050  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
00000070  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 ff  |................|

Which decodes to

Checksum Correct

Section "Monitor"
        Identifier ""
        ModelName ""
        VendorName "KPM"
        # Monitor Manufactured week 4 of 1999
        # EDID version 1.2
        # Digital Display
        # Display Physical Size not given. Normal for projectors.
        Gamma 1.00
        Option "DPMS" "true"
        Modeline        "Mode 0" -hsync -vsync 
EndSection

Which is obviously crap - no modelines are given, that's why we pick the
default 1024x768 & co modelines. Investigating further about how this used to
work. (Also manufactured in early 1999 seems surprising given that this is a
probably 2004 or so laptop...) But the checksum checks out, so we happily use
it.

Would you be so kind as include a dmesg with drm.debug=0x1e nouveau.debug=debug
from a working kernel?

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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https://bugs.freedesktop.org/show_bug.cgi?id=98149

--- Comment #3 from Dino <dino-fd97jBR+K/4TdH58SC1qeg@public.gmane.org> ---
Thanks for your kind reply. Here is the dmesg log and vbios.rom from the
working kernel 4.2.8. I am aware of that this is an old laptop, I am just
curious to find out what is the cause of this bug.

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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--- Comment #4 from Dino <dino-fd97jBR+K/4TdH58SC1qeg@public.gmane.org> ---
Created attachment 127132
  --> https://bugs.freedesktop.org/attachment.cgi?id=127132&action=edit
dmesg working log

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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https://bugs.freedesktop.org/show_bug.cgi?id=98149

--- Comment #5 from Dino <dino-fd97jBR+K/4TdH58SC1qeg@public.gmane.org> ---
Created attachment 127133
  --> https://bugs.freedesktop.org/attachment.cgi?id=127133&action=edit
vbios working rom

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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https://bugs.freedesktop.org/show_bug.cgi?id=98149

--- Comment #6 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Right, so as I expected, the working version has

[    2.538445] nouveau  [     DRM] BIOS FP mode: 1440x900 (96210kHz pixel
clock)

So we messed something up, since we no longer follow down that path in
nouveau_bios.c. Perhaps ->is_mobile is no longer getting set to true? Or some
other reason...

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[Bug 98149] EDID doesn't detect resolution 1440x900 correctly NV34 FX5200Go

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Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> changed:

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

--- Comment #7 from Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> ---
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