[Bug 75649] New: Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

[Bug 75649] New: Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

          Priority: medium
            Bug ID: 75649
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Glitchy output using only HDMI on laptop with AMD
                    Mobility Radeon HD 3450/3470
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: tderensis@gmail.com
          Hardware: x86 (IA32)
            Status: NEW
           Version: 10.0
         Component: Drivers/Gallium/r600
           Product: Mesa

Screen flickering and horizontal black/white lines mixed in with output on
redraw. This only happens when using HDMI output to a single external 1920x1080
monitor and not when using dual monitors or the single laptop screen. If the
screen is static or I move the mouse over a single color background, no
glitching happens. It seems that the more that needs to get redrawn in the
frame, the worse it gets.

I'm not sure how long this has been a problem because I rarely use a single
monitor. I'll report back when mesa 10.1 is released on Arch.

System info from Phoronix Test Suite:
Hardware:
Processor: Intel Core 2 Duo P8400 @ 2.27GHz (2 Cores), Motherboard: Sony VAIO,
Chipset: Intel Mobile 4 MCH + ICH9M, Memory: 3072MB, Disk: 320GB Western
Digital WD3200BEKT-7, Graphics: AMD Mobility Radeon HD 3450/3470 256MB
(680/800MHz), Audio: Realtek ALC262, Monitor: DELL ST2220L, Network: Marvell
88E8055 PCI-E Gigabit + Qualcomm Atheros AR928X Wireless

Software:
OS: Linux, Kernel: 3.13.5-1-ARCH (x86_64), Desktop: Cinnamon 2.0.14, Display
Server: X Server 1.15.0, Display Driver: radeon 7.3.0, OpenGL: 3.1 Mesa 10.0.3
Gallium 0.4, Compiler: GCC 4.8.2 20140206 + Clang 3.4 + LLVM 3.4, File-System:
ext4, Screen Resolution: 1920x1080

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #1 from tderensis@gmail.com ---
Problem persists even when using 3.14 kernel and mesa 10.1 in Arch.

What other information would be useful to assist in debugging this issue?

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|Mesa                        |DRI
            Version|10.0                        |unspecified
          Component|Drivers/Gallium/r600        |DRM/Radeon

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> ---
Please attach your xorg log and dmesg output.

Does it work any better with a 3.15 kernel from this tree:
http://cgit.freedesktop.org/~deathsimple/linux/log/?h=drm-fixes-3.15-wip

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #3 from tderensis@gmail.com ---
Created attachment 97429
  --> https://bugs.freedesktop.org/attachment.cgi?id=97429&action=edit
Xorg log

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #4 from tderensis@gmail.com ---
Created attachment 97430
  --> https://bugs.freedesktop.org/attachment.cgi?id=97430&action=edit
dmesg output

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #5 from tderensis@gmail.com ---
Here are the logs. I'll try out the new kernel soon.

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #6 from Paul Bodenbenner <paul.bodenbenner@gmail.com> ---
I get the same problems as described before with two different monitors. Using
an up-to-date Arch Linux with kernel 3.14 (also tried kernel 3.15rc2) with a
hd3470 card. Problem occurs only, if an external monitor is connected at
resolution 1920x1080@60Hz in single mode (extended mode makes no problems).
Funny enough when using 1920x1080@50Hz in single mode everything seems also
fine. By switching back to Catalyst the problem doesn't occur.

Found some similar threads:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1209315
https://bugs.freedesktop.org/show_bug.cgi?id=42621

By disabling color tiling and dpm the phenomenon appears only when switching
between modes (monitors on / off). So in this case when starting the laptop
with closed lid everything is ok, until switching between modes.

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #7 from tderensis@gmail.com ---
I can confirm that only switching modes to 1920x1080 causes the issue. The
latest I have tested is Arch 3.15.5, Cinnamon desktop, Mesa 10.2.4, and
xf86-video-ati 1:7.4.0. Maybe this is an xrandr issue?

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #8 from tderensis@gmail.com ---
I have been looking in the xf86-video-ati repo at drmmode_display.c and the
drmmode_sf86crtc_resize() function but can't find anything so far.

It seems from Paul's comments that the issue may be related to the refresh rate
as well. Are there any suggestion as to places to look in the code?

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #9 from Alex Deucher <agd5f@yahoo.com> ---
(In reply to comment #8)
> I have been looking in the xf86-video-ati repo at drmmode_display.c and the
> drmmode_sf86crtc_resize() function but can't find anything so far.
> 
> It seems from Paul's comments that the issue may be related to the refresh
> rate as well. Are there any suggestion as to places to look in the code?

Everything that touches the hw is in the kernel driver.  Does disabling dpm fix
the issue?

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #10 from Alex Deucher <agd5f@yahoo.com> ---
If you are using dpm, make sure your ddx has this patch:
http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=c4ae0e2cbcc0e2ebf9f13ee92d59b5120254a1dc

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #11 from tderensis@gmail.com ---
(In reply to comment #10)
> If you are using dpm, make sure your ddx has this patch:
> http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/
> ?id=c4ae0e2cbcc0e2ebf9f13ee92d59b5120254a1dc

I am using the latest ddx from git. Enabling or disabling dpm using the kernel
option radeon.dpm=1 or radeon.dpm=0 does not help. It seems like the more
redraws the GPU has to do, the worse things get. For example, sitting at the
desktop with nothing moving is fine. Opening chromium, many horizontal lines
matching the color of whatever is on the screen begin to flicker on and off.

Is it possible that color tiling is the culprit as described in
https://bugs.freedesktop.org/show_bug.cgi?id=42621

His symptoms sound identical (only happens on 1920x1080 resolution, smaller
resolutions work).

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #12 from tderensis@gmail.com ---
OK so I disabled color tiling in my xorg.conf and that worked. Disabling color
tiling 2D did not work.

So it seems to be an issue with 1D color tiling and single 1920x1080 resolution
monitor at 60Hz refresh rate.

I changed refresh rate to 50Hz using xrandr and that fixed the issue as well
(pointed out by Paul previously).

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

--- Comment #13 from Alex Deucher <agd5f@yahoo.com> ---
Does booting with radeon.disp_priority=2 on the kernel command line in grub
help?

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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--- Comment #14 from tderensis@gmail.com ---
(In reply to comment #13)
> Does booting with radeon.disp_priority=2 on the kernel command line in grub
> help?

That fixes it. Thanks.

Do you have any idea why this happens with a single monitor but not a duel
setup?

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[Bug 75649] Glitchy output using only HDMI on laptop with AMD Mobility Radeon HD 3450/3470

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https://bugs.freedesktop.org/show_bug.cgi?id=75649

Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #15 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

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

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/453.

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