External display stopped working, "dpcd read failed: -22" in dmesg
#3
Hi,

I am currently investigating myself why during a travel session at the beginning of February I suddently could not drive an external monitor anymore.

I now reinstalled the OS based on danielt's scripts with crypted Debian Buster - the dptx.bin file is present in initramfs and loads.

The errors I see are the exact same as in zackw's last post.

I got three different adapters - 2x DP Alternative Mode to HDMI and 1x a pure DP one.

I don't remember which adapter worked before, but one most definitively did. Now all three only result in "Enable dp failed -19".
It makes no difference if i use the 5.4 or the 5.5 kernel - so far I did not install the stock OS again.

Any other part of the adapters(Network, USB-A, microSD Readers) work.

Its all a bit strange.


Messages In This Thread
RE: External display stopped working, "dpcd read failed: -22" in dmesg - by stephan48 - 03-15-2020, 03:35 PM

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