[Bug 103347] [dp] intel_dp.c:1554 WARN_ON(len <=8)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103347

--- Comment #29 from shashank.sharma at intel.com <shashank.sharma at intel.com> ---
(In reply to F.Hartung from comment #28)
> Created attachment 138945 [details]
> dmesg J3455-itx with boot args drm.debug=0x0e - without edid
> 
> The edid boot arg is vital for me because without this edid.bin you won't
> get any picture unless you start the HTPC while the TV is set to the HTPC
> HDMI output.
> I deleted the edid and and attached the dmesg output. It's not suitable at
> all to reboot everytime you want to switch to the HTPC.
> 
> Basically you tell me to:
> 1. stay on kernel 4.15.x and get along with a flooded dmesg output
> 2. revert to kernel 4.14.x because this kernel worked fine with the edid
> 3. delete the edid.bin and reboot everytime in want to use the HTPC

I can see from the attached logs that the warning is already gone, so its clear
that the boot arg was causing the problem. 

Now I am not sure if I understood your problem correctly, 
> without this you won't get any picture unless you start the HTPC while the TV > is set to the HTPC HDMI output.

Can you give more details on:
- What exactly is your HDMI output connection arrangement ?
- How do you start the HTPC ? 
- What problems are you seeing while switching to/from HTPC ?

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