https://bugs.freedesktop.org/show_bug.cgi?id=93753
Bug ID: 93753 Summary: Sometimes wrong clk frequency of Display after dpms mode changes. Product: DRI Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: major Priority: medium Component: DRM/Radeon Assignee: dri-devel@lists.freedesktop.org Reporter: t.graziadei@bachmann.info
Created attachment 121103 --> https://bugs.freedesktop.org/attachment.cgi?id=121103&action=edit Screenshot of failure
Sometimes after the deactivation of the screensaver or also on bootup the screen shows flickering noise and a duplicated screen image. (Attached there is the used test image and a screenshot of the failure image).
We tested on various kernel versions, latest kernel tested was 4.4.0. We run a customized debian image.
Further investigations showed, that in the failure scenario the measured clk frequency was only 25MHz but it should be 35MHz.
We also tried to deactivate dpms completly (radeon.dpm=0 in kernel parameters) and also turned the dpms off in the screensaver, but we still sometimes encounter the problem after a reboot.
Attached you will find a dmesg output with drm.debug=0xf activated.
We use a Radeon PALM on a AMD G-T40E 2x1GHz
https://bugs.freedesktop.org/show_bug.cgi?id=93753
--- Comment #1 from t.graziadei@bachmann.info --- Created attachment 121104 --> https://bugs.freedesktop.org/attachment.cgi?id=121104&action=edit original test image
https://bugs.freedesktop.org/show_bug.cgi?id=93753
--- Comment #2 from t.graziadei@bachmann.info --- Created attachment 121105 --> https://bugs.freedesktop.org/attachment.cgi?id=121105&action=edit dmesg output of startup in case of failure
https://bugs.freedesktop.org/show_bug.cgi?id=93753
t.graziadei@bachmann.info changed:
What |Removed |Added ---------------------------------------------------------------------------- Attachment #121103|0 |1 is obsolete| |
--- Comment #3 from t.graziadei@bachmann.info --- Created attachment 121106 --> https://bugs.freedesktop.org/attachment.cgi?id=121106&action=edit Screenshot of failure
https://bugs.freedesktop.org/show_bug.cgi?id=93753
t.graziadei@bachmann.info changed:
What |Removed |Added ---------------------------------------------------------------------------- Attachment #121104|0 |1 is obsolete| |
--- Comment #4 from t.graziadei@bachmann.info --- Created attachment 121107 --> https://bugs.freedesktop.org/attachment.cgi?id=121107&action=edit original test image
https://bugs.freedesktop.org/show_bug.cgi?id=93753
t.graziadei@bachmann.info changed:
What |Removed |Added ---------------------------------------------------------------------------- Priority|medium |high Severity|major |critical
https://bugs.freedesktop.org/show_bug.cgi?id=93753
Alex Deucher alexdeucher@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Attachment #121103|text/plain |image/jpg mime type| |
https://bugs.freedesktop.org/show_bug.cgi?id=93753
Alex Deucher alexdeucher@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Attachment #121104|text/plain |image/jpg mime type| |
https://bugs.freedesktop.org/show_bug.cgi?id=93753
--- Comment #5 from Alex Deucher alexdeucher@gmail.com --- What mode are you trying to set? Please attach your xorg log and and config (if you have one) and the xrandr --verbose output.
https://bugs.freedesktop.org/show_bug.cgi?id=93753
--- Comment #6 from Alex Deucher alexdeucher@gmail.com --- DPM has nothing to do with the display clocks or dpms. It's engine clock management. Also which display are you having problems with, VGA or LVDS?
https://bugs.freedesktop.org/show_bug.cgi?id=93753
Martin Peres martin.peres@free.fr changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |MOVED
--- Comment #7 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/678.
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