[Bug 64850] New: Second screen black on Pitcairn PRO

[Bug 64850] New: Second screen black on Pitcairn PRO

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

          Priority: medium
            Bug ID: 64850
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Second screen black on Pitcairn PRO
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: flocke@shadowice.org
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 79637
  --> https://bugs.freedesktop.org/attachment.cgi?id=79637&action=edit
dmesg | grep drm right after boot (no X11)

I just installed my new Pitcairn PRO card (Radeon 7850) in my PC.

Every time I boot into linux (Arch Linux x86_64) my second monitor turns black
right at boot.
There are no errors and I can even start X11 with my dual-monitor configuration
and move the mouse from my first screen to the right. It is as if the screen is
there, only my monitor doesn't show it.

This happens not in X11, in fact the secend screen goes black as soon as the
kernel/kms is loaded.

I attached the output of 'dmesg | grep drm' with the drm.debug=15 kernel option
right after booting and befor starting X11 and I will attach the same commands
output after running X11.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #1 from Jakob Nixdorf <flocke@shadowice.org> ---
Created attachment 79638
  --> https://bugs.freedesktop.org/attachment.cgi?id=79638&action=edit
dmesg | grep drm after X11 start

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #2 from Jakob Nixdorf <flocke@shadowice.org> ---
Forgot some information, as always ;)

I tried it with a self-build kernel 3.10-rc2 and the Arch Linux stock 3.9.3,
both with the same result. Will try some older kernels soon.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #3 from Jakob Nixdorf <flocke@shadowice.org> ---
Update:

I tested the Arch Linux kernels 3.9.2 and 3.8.11 with the same result.

And, in case it is important, I noticed this line in dmesg:

[    3.169540] radeon 0000:01:00.0: Invalid ROM contents

I hope this can help further.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> ---
Please attach your xorg log.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> ---
Is it the HDMI monitor that's not working?  If so, try setting radeon.audio=0
on the kernel command line in grub.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #6 from Jakob Nixdorf <flocke@shadowice.org> ---
I will upload my xorg log as soon as possible. But I think its a DRM or KMS
issue, since it already happens before I start X (no TTY on the second screen
at boot after KMS starts).

And no, its not the HDMI screen, its the one connected via DVI.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #7 from Alex Deucher <agd5f@yahoo.com> ---
Does manually turning the problematic monitor off/on or picking a different
mode with xrandr help?

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #8 from Jakob Nixdorf <flocke@shadowice.org> ---
Created attachment 79671
  --> https://bugs.freedesktop.org/attachment.cgi?id=79671&action=edit
xorg log

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #9 from Jakob Nixdorf <flocke@shadowice.org> ---
Ok, i tested a few things:

Turning the monitor off/on dosen't do anything, its still black.

Using xrandr to change the mode causes the first monitor to also turn black, I
will upload the output of "dmesg | grep drm" after the xrandr command,
Xorg.0.log doesn't say anything new.

The output of the xrandr command itself (with --verbose) is:

crtc 1: disable
screen 0: 2960x1050 780x277 mm  96.28dpi
crtc 1:    1280x1024   75.0 +1680+0 "DVI-0"

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #10 from Jakob Nixdorf <flocke@shadowice.org> ---
Created attachment 79672
  --> https://bugs.freedesktop.org/attachment.cgi?id=79672&action=edit
dmesg | grep drm after xrandr

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #11 from Alex Deucher <agd5f@yahoo.com> ---
(In reply to comment #9)
> Ok, i tested a few things:
> 
> Turning the monitor off/on dosen't do anything, its still black.

sorry, I meant using xrandr; e.g., 

xrandr --output DVI-0 --off
xrandr --output DVI-0 --auto

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #12 from Alex Deucher <agd5f@yahoo.com> ---
Can you also try booting with only one monitor connected?  Does the DVI monitor
work in that case?  Also try booting with one monitor connected and then add
the second one after X is started and see if both are enabled properly in that
case.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #13 from Alex Deucher <agd5f@yahoo.com> ---
Do both heads work properly if you temporarily remove your xorg.conf?

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #14 from Jakob Nixdorf <flocke@shadowice.org> ---
'xrandr --output DVI-0 --off' causes the first screen (HDMI-0) to turn black
too, and the DVI screen gets really switched off (monitor switches to standby).

Blind-typing 'xrandr --output DVI-0 --auto' turns the DVI screen back on (still
only a black screen) and the HDMI screen also stays black.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #15 from Jakob Nixdorf <flocke@shadowice.org> ---
Nothing of the things you suggested worked.

Without xorg.conf the problem is still present.

Booting with only DVI-0 plugged in works fine.
If I plug in HDMI-0 with X11 running everything stays the same and the HDMI
monitor says "No signal", when I try to activate it via xrandr both monitors
switch to black.
If I plug in HDMI-0 in TTY the TTY is switched to the HDMI monitor and the DVI
monitor goes black.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #16 from Jakob Nixdorf <flocke@shadowice.org> ---
I checkt again when the second monitor is switched off.

I booted with radeon.modeset=0, which caused the radeon module to not be loaded
since I don't have UMS support in my kernel. With this both monitors work and I
can get a TTY on both.
But as soon as I run 'modprobe -v radeon modeset=1' the second monitor is
switched off to black.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #17 from Jakob Nixdorf <flocke@shadowice.org> ---
Created attachment 79737
  --> https://bugs.freedesktop.org/attachment.cgi?id=79737&action=edit
ROM Dump

I played around some more. I compiled my kernel with UMS enabled and booted
with 'radeon.modeset=0' which resultet in the 'radeon' module beeing loaded
successful and without the 'Invalid ROM contents' error. Also both screens are
active in the TTY.
After running 'rmmod radeon && modprobe -v radeon modeset=1' the DVI-0 screen
goes black again and the TTY is only shown on HDMI-0. Also the 'Invalid ROM
contents' error shows up again.

Additionally I made a dump of the ROM ('echo 1 >
/sys/bus/pci/devices/0000:01:00.0/rom && cat
/sys/bus/pci/devices/0000:01:00.0/rom > rom-dump'), because this error somehow
bugs me ;) maybe it can help.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #18 from Jakob Nixdorf <flocke@shadowice.org> ---
New update: It seems to have nothing to do with the connectors that are used.
I just got my mini-DisplayPort to DVI adapter and tested it. No combination
works (HDMI+mDP, DVI+mDP, HDMI+DVI) the second screen is always black.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #19 from akb825@gmail.com ---
I have a Radeon 7870 and I have the same problem: the desktop extends as if
there are 2 monitors, but the second monitor is always black. I have both
monitors plugged into DVI ports (DVI-0 and DVI-1), and xrandr correctly
recognizes both monitors as being present as well as all of their display
modes, but whenever I try to change the display to one monitor or the other it
will only ever display on the monitor plugged into DVI-0.

When I go through the display settings tool in XFCE (which I'm assuming is just
a UI around xrandr) it correctly shows both monitors, but whenever I try to
adjust the second monitor's resolution or disable the second monitor it
completely corrupts the display (showing a striped pattern on the first
monitor, second monitor is still black) and the only way to recover is to
reboot. I can switch to a tty terminal and blindly type commands, but when I
attempted to shut down my display manager daemon and unload the radeon module
nothing happened, though since the display was corrupted I couldn't see if
either of the commands failed. Adjusting the resolution of the first monitor
works correctly.

One thing to note is whenever I start xorg, the following gets printed several
times to the error log:
May 29 20:27:31 localhost kernel: [  199.484959] radeon 0000:02:00.0: bo
ffff8801ad899400 don't has a mapping in vm ffff8801affc6980

I am also using 64-bit Arch Linux, running under kernel 3.9.4 and xorg 1.14.1.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #20 from Jakob Nixdorf <flocke@shadowice.org> ---
Just FYI:
This bug is still present with kernel 3.10.0 and the newest firmware from git.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #21 from Niels Ole Salscheider <niels_ole@salscheider-online.de> ---
Does it work for you with older kernels? If so, can you bisect?

I wonder if this is the same as
https://bugzilla.kernel.org/show_bug.cgi?id=58121 .

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #22 from Jakob Nixdorf <flocke@shadowice.org> ---
I tried every kernel since 3.8.11 and will try some older ones later today.
Are any versions of special interest that I can try them first?

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #23 from Jakob Nixdorf <flocke@shadowice.org> ---
Just tested the first kernel with RadeonSI support (3.4.0 to my knowledge) with
the same result.
Second screen stays black in TTY and in Xorg.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #24 from Jakob Nixdorf <flocke@shadowice.org> ---
Update: Problem still exists on kernel 3.11-rc1.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |me@elemc.name

--- Comment #25 from Alex Deucher <agd5f@yahoo.com> ---
*** Bug 66934 has been marked as a duplicate of this bug. ***

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #26 from Alex Deucher <agd5f@yahoo.com> ---
Created attachment 84273
  --> https://bugs.freedesktop.org/attachment.cgi?id=84273&action=edit
possible fix 1/2

seems to be a problem with the line buffer setup on certain boards.  Please try
this patch set.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #27 from Alex Deucher <agd5f@yahoo.com> ---
Created attachment 84274
  --> https://bugs.freedesktop.org/attachment.cgi?id=84274&action=edit
possible fix 2/2

Please apply both patches.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #28 from Alexei Panov <me@elemc.name> ---
This patchset works for me.
HD7870 GHz Edition
kernel-3.11.0-0.rc5.git6.2.fc20

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #29 from Jakob Nixdorf <flocke@shadowice.org> ---
Applied the two patches on top of 3.11-rc6 and everything works fine.

Thank you, now I can finally nuke fglrx and still work with dual screen :)

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

--- Comment #30 from George Emigh <glemigh@yahoo.com> ---
Had the same problem with XFX R7750 Core Edition 1G (ATI Cape Verde PRO [Radeon
HD 7750])

I applied the patches found in this bug report to 3.11.0-gentoo kernel, they
seemed to apply fine and now I have 2 working displays.

Thank you very much.

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[Bug 64850] Second screen black on Pitcairn PRO

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https://bugs.freedesktop.org/show_bug.cgi?id=64850

Alex Deucher <agd5f@yahoo.com> changed:

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

--- Comment #31 from Alex Deucher <agd5f@yahoo.com> ---
fixed with:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=290d24576ccf1aa0373d2185cedfe262d0d4952a

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