[Bug 103331] No signal output when connected with HDMI Monitor (asus PA238Q)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103331

--- Comment #17 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to Ethan Hsieh from comment #16)
> Hi Ville
> 
> Still can reproduce the issue with asus PA238Q and DVI port.
> Please refer to comment#15 for detailed log.

Hmm. Yeah, looks like the DVI EDID is corrupted in the exact same way. We've
not had reports of other corrupted EDIDs on these display so I'm leaning
towards this being just some random EDID corruption in your particular display.

You would either need to fix the EDID in the display via i2c (often there's
some kind of service menu available by which you can toggle write protection of
the EEPROM) via i2c. Or you need to use the firmware edid loader to override
the EDID, which would involve something like putting the fixed EDID into
/lib/firmware (or the initramfs if you load i915 from there) and pass the
drm.edid_firmware=HDMI-A-1:fixed.edid option to the kernel. I'll attach the
fixed EDIDs to the bug...

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