[Bug 112407] [i915] eDP cannot light up after waking up from suspend the second time.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112407

Lakshmi <lakshminarayana.vudum at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #6 from Lakshmi <lakshminarayana.vudum at intel.com> ---
(In reply to Yvonne from comment #3)
> (In reply to Lakshmi from comment #2)
> > (In reply to Yvonne from comment #0)
> > > 
> > > Expected result:
> > > After step3, eDP should light up after waking up from suspend.
> > > 
> > What have you done to make eDP working after step3?
> 
> eDP cannot light up, but remote can connect to system. Issue only can be
> recovered via reboot. 
> 
> > Can you attach the full dmesg from boot with kernel parameters
> > drm.debug=0x1e log_buf_len=4M.
> > 
> > Also, I would recommend to reproduce this issue using drm-tip
> > (https://cgit.freedesktop.org/drm-tip)
> 
> I tried to reproduce issue with drm-tip (top commit is 20edef7), but with
> the kconfig I attached, it seems suspend cannot work. System will hang if do
> suspend via "sudo rtcwake -m mem -s 10" 
> 
> Besides, I tried to reproduce this issue on CML RVP with codec ALC700 in SDW
> mode with
> linux-image-unsigned-5.4.0-050400-generic_5.4.0-050400.201911242031_amd64.
> deb, issue can still be reproduced. Full dmesg with kernel parameters
> drm.debug=0x1e log_buf_len=4M please see the attachment.

@Jon, any comments here?

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