[Bug 109112] "*ERROR* Failed to probe lspcon" when HDMI isn't plugged before boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109112

--- Comment #37 from Swati Sharma <swati2.sharma at intel.com> ---
(In reply to Josh from comment #36)
> I have a new Dell Precision 7540 that came with OEM Ubuntu LTS and I have
> the same errors in Ubuntu LTS and Arch stable and I also tried Kubuntu
> 19.10. So on all kernels and all Distro's I guess. I have both Intel and AMD
> Graphics and I am using the modesetting i915 driver as default. I also have
> the mesa hardware acceleration driver installed and xf86-video-amdgpu
> installed.
> 
> Operating System: Arch Linux 
> KDE Plasma Version: 5.17.1
> KDE Frameworks Version: 5.63.0
> Qt Version: 5.13.1
> Kernel Version: 5.3.7-arch1-1-ARCH
> OS Type: 64-bit
> Processors: 12 × Intel® Core™ i7-9750H CPU @ 2.60GHz
> Memory: 15.4 GiB of RAM
> 
> 
> [josh at archkde ~]$ dmesg --level=err,warn                     
> [    0.462839] MDS CPU bug present and SMT on, data leak possible. See
> https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more
> details.
> [    0.501892]   #7  #8  #9 #10 #11
> [    0.669275] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
> [    2.043797] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
> [    2.043822] [drm:intel_ddi_init [i915]] *ERROR* LSPCON init failed on
> port D

Hi Josh,
Can you confirm whether its MCA or Parade LSPCON?
If its MCA, please update your FW. 
Intel download center for NUC devices has FW V 1.77 available, along with the
flashing utility.
-FW for Coffee Lake based NUC:
https://downloadcenter.intel.com/download/29092/HDMI-Firmware-Update-Tool-for-NUC8i3BE-NUC8i5BE-NUC8i7BE
-FW for our Kaby Lake NUC:
https://downloadcenter.intel.com/download/29162/HDMI-Firmware-Update-Tool-for-NUC7i3BN-NUC7i5BN-NUC7i7BN?product=95067

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