[Bug 66341] Screen dead

[Bug 66341] Screen dead

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https://bugzilla.kernel.org/show_bug.cgi?id=66341

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alan@lxorguk.ukuu.org.uk
          Component|Video(Other)                |Video(DRI - non Intel)
           Assignee|drivers_video-other@kernel- |drivers_video-dri@kernel-bu
                   |bugs.osdl.org               |gs.osdl.org

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[Bug 66341] Screen dead

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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.

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[Bug 66341] Screen dead

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--- Comment #2 from svily0@yahoo.com ---
Created attachment 117351
  --> https://bugzilla.kernel.org/attachment.cgi?id=117351&action=edit
Xorg.log

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[Bug 66341] Screen dead

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--- Comment #3 from svily0@yahoo.com ---
Created attachment 117361
  --> https://bugzilla.kernel.org/attachment.cgi?id=117361&action=edit
dmesg

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[Bug 66341] Screen dead

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--- Comment #4 from Alex Deucher <alexdeucher@gmail.com> ---
It looks like maybe you have a loose or bad connection to the LCD panel.  As
you can see in your log, the driver isn't even detecting a panel:

[drm] Radeon Display Connectors
[drm] Connector 0:
[drm]   VGA-1
[drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[drm]   Encoders:
[drm]     CRT1: INTERNAL_KLDSCP_DAC1
[drm] Connector 1:
[drm]   HDMI-A-1
[drm]   HPD1
[drm]   DDC: 0x7e60 0x7e60 0x7e64 0x7e64 0x7e68 0x7e68 0x7e6c 0x7e6c
[drm]   Encoders:
[drm]     DFP1: INTERNAL_UNIPHY

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[Bug 66341] Screen dead

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--- Comment #5 from svily0@yahoo.com ---
Yes, that is the problem, the screen is dead! If I attach a brand new LCD panel
it works... but I don't really want to buy a second one now. There isn't any
obvious damage on the panel, but today I swapped it with the original one and
they both doesn't work. Kernel reports disconnection, but it's a damage or
malfunction.

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--- Comment #6 from Alex Deucher <alexdeucher@gmail.com> ---
Can you test the panel on another system?  Sound to me like a hw problem. 
Maybe a wonky connector on the motherboard?  Does jiggling or pressing on the
connector help?

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--- Comment #7 from svily0@yahoo.com ---
I connected a third panel today and it works, the two old ones do not! It's not
the connector, just the panels were somehow rendered unusable. I don't really
know how to investigate further as the panel is a complete unit, which is hard
to open. There is no backlight and there is not even the faintest of image on
the LCD.
Another strange thing is that, when booting with radeon.dpm=1, even the HDMI
output doesn't work after doing the mode setting and before KDE is started.
Without this parameter I can see all kernel messages at boot time.

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