[Bug 211807] [drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on addr 0x60 for 1 bytes NAKed

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=211807

Renaud R. (kernelorg at iopsthecloud.com) changed:

           What    |Removed                     |Added
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                 CC|                            |kernelorg at iopsthecloud.com

--- Comment #18 from Renaud R. (kernelorg at iopsthecloud.com) ---
My setup:
* Latitude E5570 via dock DisplayPort
* Kernel: https://bugzilla.kernel.org

I randomly have blackscreen and I see in my logs (dmesg):
* i915 0000:00:02.0: [drm] *ERROR* mstb 00000000adcef9b1 port 1: DPCD read on
addr 0x4b0 for 1 bytes NAKed
* [38971.851918] i915 0000:00:02.0: [drm] *ERROR* mstb 00000000adcef9b1 port 1:
DPCD read on addr 0x4b0 for 1 bytes NAKed

My laptop was reinstall from and old ubuntu 18.04 to 20.04. I can't remember
the kernel used in Unbuntu 18.04 but I didn't have this issue.

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