[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 kernel.org]

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

notsyncing (song.fc at gmail.com) changed:

           What    |Removed                     |Added
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                 CC|                            |song.fc at gmail.com

--- Comment #20 from notsyncing (song.fc at gmail.com) ---
I also have this on my laptop, using a USB-C to 3xHDMI adapter with 3 monitors.
When I unplug and replug it, sometimes the screen will freeze and I have to
force reboot.

log shows:

i915 0000:00:02.0: [drm] *ERROR* mstb 00000000c152fe9e port 1: DPCD read on
addr 0x4b0 for 1 bytes NAKed
i915 0000:00:02.0: [drm] *ERROR* mstb 00000000c152fe9e port 2: DPCD read on
addr 0x4b0 for 1 bytes NAKed

The machine also dies when resuming from suspend with the adapter plugged in,
but I could not get any log, just guessing it might be the same issue.

my setup:

HP Envy 13 ad110tu (i5-8250U, UHD 620)
Archlinux with kernel 5.16.13-arch1-1 x86_64, KDE Plasma 5.24.3 on Wayland

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