[Bug 51983] [ivb DVI fdi link train fail] Multiple Displays not working on Core i7 3770S

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=51983

Rodney Dawes <dobey.pwns at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |REOPENED

--- Comment #15 from Rodney Dawes <dobey.pwns at gmail.com> ---
(In reply to comment #14)
> (In reply to comment #13)
> > (In reply to comment #12)
> > > Created attachment 72641 [details]
> > > dmesg data for drm.debug=0xe
> > 
> > Just to check: Is that dmesg from 3.8-rc2?
> 
> BOOT_IMAGE=/vmlinuz-3.8.0-030800rc2-generic in the dmesg suggests so... but
> there's no FDI link train errors and I don't spot another monitor there
> either.
> 
> Are you using HDMI for both monitors? Or something else? Any adapters in
> between?

It is the 3.8-rc2 kernel which I linked to earlier, yes.

I think the drm.debug is perhaps causing them to either not get logged, or
there is just too much information from drm.debug, and they end up not
appearing. The output of running 'dmesg' and looking at /var/log/dmesg are not
consistent.

I am not using HDMI for any monitors. The board doesn't even have HDMI. It has
2 DVI ports, and one Displayport. I'm using DVI for both monitors. No adapters
for anything. Monitors are both Samsung 2343BWX. When trying to configure the
second display to a working resolution (1280x800), then back to the native
resolution, and finally back to mirroring, I get this from "dmesg|grep fdi" :

[85024.350500] [drm:ironlake_check_fdi_lanes], checking fdi config on pipe 1,
lanes 1
[85024.573818] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR before link train
0x0
[85024.574471] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x100
[85024.574474] [drm:ivb_manual_fdi_link_train], FDI train 1 done, level 0.
[85024.575126] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x600
[85024.575129] [drm:ivb_manual_fdi_link_train], FDI train 2 done, level 0.
[85024.575131] [drm:ivb_manual_fdi_link_train], FDI train done.
[85072.643845] [drm:ironlake_check_fdi_lanes], checking fdi config on pipe 1,
lanes 2
[85072.867168] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR before link train
0x0
[85072.867821] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.868322] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.868824] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.869325] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.869329] [drm:ivb_manual_fdi_link_train] *ERROR* FDI train 1 fail!
[85072.869982] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.870481] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.870984] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.871484] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85072.871486] [drm:ivb_manual_fdi_link_train] *ERROR* FDI train 2 fail!
[85072.871487] [drm:ivb_manual_fdi_link_train], FDI train done.
[85089.743424] [drm:ivb_modeset_global_resources], disabling fdi C rx
[85089.745990] [drm:ironlake_check_fdi_lanes], checking fdi config on pipe 1,
lanes 2
[85089.745995] [drm:cpt_enable_fdi_bc_bifurcation], enabling fdi C rx
[85089.911413] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR before link train
0x0
[85089.912066] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.912567] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.913068] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.913569] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.913573] [drm:ivb_manual_fdi_link_train] *ERROR* FDI train 1 fail!
[85089.914225] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.914724] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.915230] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.915730] [drm:ivb_manual_fdi_link_train], FDI_RX_IIR 0x0
[85089.915732] [drm:ivb_manual_fdi_link_train] *ERROR* FDI train 2 fail!
[85089.915733] [drm:ivb_manual_fdi_link_train], FDI train done.

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