[Bug 188091] New: Resume with two monitors, second monitor is not resumed until VT switch

[Bug 188091] New: Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

            Bug ID: 188091
           Summary: Resume with two monitors, second monitor is not
                    resumed until VT switch
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.9 rc5
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: gwhite@kupulau.com
        Regression: No

This is for AMDGPU.  

I have an RX470 with two monitors attached via DP.  After a long suspend, when
one of the monitors has apparently gone into a deeper sleep state, it takes one
of them longer to wake.  When this happens,  the second monitor is not detected
and will not be seen until I switch to a VT and then back again.  Here's what I
see in dmesg before the switch:

18887.893100] [drm:amdgpu_atombios_dp_link_train] *ERROR* displayport link
status failed
[18887.893103] [drm:amdgpu_atombios_dp_link_train] *ERROR* clock recovery
failed
[18888.070075] [drm:amdgpu_atombios_dp_link_train] *ERROR* displayport link
status failed
[18888.070077] [drm:amdgpu_atombios_dp_link_train] *ERROR* clock recovery
failed

Again, after I switch to a VT and then back again, all is well.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your xorg log and dmesg output.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #2 from Greg White <gwhite@kupulau.com> ---
Created attachment 245461
  --> https://bugzilla.kernel.org/attachment.cgi?id=245461&action=edit
Xorg log

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #3 from Greg White <gwhite@kupulau.com> ---
Created attachment 245471
  --> https://bugzilla.kernel.org/attachment.cgi?id=245471&action=edit
dmesg

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #4 from Greg White <gwhite@kupulau.com> ---
Note that those two files were grabbed after I switched to a VT (since the UI
was in a pretty whacked state.)

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #5 from Greg White <gwhite@kupulau.com> ---
I should also note this is easily reproducible but still intermittent.  I'd say
80% of the time, I see this.  It's also not always one monitor - it can be
either of them.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #6 from Vedran Miletić <vedran@miletic.net> ---
(In reply to Greg White from comment #5)
> I should also note this is easily reproducible but still intermittent.  I'd
> say 80% of the time, I see this.  It's also not always one monitor - it can
> be either of them.

Interesting. I have a very similar issue on Fiji (bug 176311) with two DP
monitors, but in case of Fiji it is always one monitor that will be blank until
the VT switch happens. And the error message is different.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #7 from Greg White <gwhite@kupulau.com> ---
I have attached a patch which seems to fix the problem here.  Maybe it will be
helpful?

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 188091] Resume with two monitors, second monitor is not resumed until VT switch

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=188091

--- Comment #8 from Greg White <gwhite@kupulau.com> ---
Created attachment 246801
  --> https://bugzilla.kernel.org/attachment.cgi?id=246801&action=edit
Patch against atombios_dp.c

Seems to fix the problem locally.  I have no idea if it's correct or not, but
it may help tracking down the actual problem.

On my system, I see one training attempt when the monitors are on, 4-5 when
they are in standby.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel