[Bug 200695] Blank screen on RX 580 with amdgpu.dc=1 enabled (no displays detected)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=200695

farshad (farshad at 7d.nz) changed:

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                 CC|                            |farshad at 7d.nz

--- Comment #49 from farshad (farshad at 7d.nz) ---
Had the same problem 
on a Dell Latitude 5410 
with a Lexa Radeon E9171 MCM
and linux kernel 4.19.0.13 (Debian Buster),

Read it's still and issue with 4.20-rc5

*Now operational with a kernel 5.11*
default options.

The Lexa serie is in the RX540, RX550 550X et RX550X range,
(sold 80$ en 2017)

DRM was loading followed by 
ACPI error, field tmpb at bot offset exceed size of target buffer...
method parse/execution failed SB.PCIO.GFX0.ATRM, AE_AML_BUFFER_LIMIT
Error message was :
Error DC : number of connector is zero

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