Bug 54471

Summary: one of three monitors will not light up post-kms on radeon 5770
Product: xorg Reporter: Gabriel Somlo <gsomlo>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED MOVED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: florian
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg output
none
xorg log none

Description Gabriel Somlo 2012-09-04 00:43:12 UTC 
Created attachment 66584 [details]
dmesg output

I have the MacPro5,1 version of Radeon 5770 (see http://www.amazon.com/gp/product/B003Z6QH6M), and have three Dell U2412M monitors connected to it (two via miniDP-to-DP cables, the third one using the DVI cable included with the monitor).

X11 sees all three monitors (DisplayPort-0, DisplayPort-1, and DVI-0), but immediately after KMS during boot, DisplayPort-1 goes into powersave and cannot be "woken up". DisplayPort1 is the first screen that "lights up" when the machine is powered on. Once grub kicks in, both DisplayPort-0 and DisplayPort-1 are mirrored, with DVI-0 being off. After KMS, DVI-0 lights up, and DisplayPort-1 goes to sleep.

Tinkering with the Gnome display settings and/or xrandr will sometimes wake up DisplayPort-1, but always at the expense of turning off either DisplayPort-0 or DVI-0 instead. I could never get all three of them to light up under Linux.

I'm using up-to-date stock F16 (3.4.9-2.fc16.x86_64), but have also tried 3.6-rc4 with the same results.

I'm attaching my dmesg output and Xorg.0.log.
Comment 1 Gabriel Somlo 2012-09-04 00:43:36 UTC 
Created attachment 66585 [details]
xorg log
Comment 2 Alex Deucher 2012-09-04 01:05:14 UTC 
Please try the latest 3.6.0 kernels or my 3.6 fixes tree:
http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-fixes-3.6
There are a number of modesetting fixes that may help.
Comment 4 Gabriel Somlo 2012-09-04 17:43:16 UTC 
(In reply to comment #3)
> You might also try this patch:
> http://cgit.freedesktop.org/~agd5f/linux/commit/?h=drm-next-3.7-wip&id=c1857e07e8abac2c19fda9b1da96ac461ec55827

This (on top of 3.6-rc4, which already contains everything you point to in comment #2, and which I had already tried before opening this) fixes the problem and lights up all three of my monitors --Thanks !
Comment 5 Florian Mickler 2012-10-15 20:45:05 UTC 
A patch referencing this bug report has been merged in Linux v3.7-rc1:

commit f3dd8508d459a2d0d0bc426144b92f1696d4fe86
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Aug 31 11:56:50 2012 -0400

    drm/radeon: rework pll selection (v4)
Comment 6 Florian Mickler 2012-10-15 20:50:44 UTC 
A patch referencing this bug report has been merged in Linux v3.6-rc6:

commit 985f61f7ee647ad570c05eab0b74915da2ac8e19
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Aug 31 11:56:50 2012 -0400

    drm/radeon: rework pll selection (v3)
Comment 7 Florian Mickler 2012-10-15 21:18:34 UTC 
A patch referencing a commit referencing this bug report has been merged in Linux v3.6-rc7:

commit 2f1f4d9b60396d2df4cff829bd5376ffc8ed9a2c
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Mon Sep 17 17:26:24 2012 -0400

    Revert "drm/radeon: rework pll selection (v3)"
Comment 8 Martin Peres 2019-11-19 07:36:00 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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