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odroid-c2: HDMI to dvi cable on standard computer monitor black screen #253

Open kroylar opened 7 years ago

kroylar commented 7 years ago

I tracked down a problem that others have been experiencing. Seeing a black screen, cable not supported, monitor falling asleep, when booting up their odroid-c2.

Odroid C2 HDMI no display after kernel upgrade C2 Arch Linux recent kernel update messes up video output C2-10-03-2016 Ubuntu no DVI video

The code that supposedly fixed the issue as mentioned in the latter topic is what caused the issue. This commit for reference: 876831945dbeb66878647f975b188ed95c9000c1

I'm using Arch. So the last unmodified version that worked for me is 3.14.79-5 which is commit 135cacc3251a1265ec1c67a02af469372f178b9b. The very next Arch version, 3.14.79-6, commit 8186343c319a1427408b084a67c7da09d4d20235, does not work anymore.

I reverted that change on the latest master and rebuilt using the latest Arch PKGBUILD, 3.14.79-12, and the screen is working again.

kroylar commented 7 years ago

Could Joy Cho joy.cho@hardkernel.com comment on the original commit, 8768319? I don't understand how a default OSD refresh routine would fix a dvi problem.

JeonghwaCho commented 7 years ago

Hi kroylar, As you know, I'm following the issue on the following forum thread. :) http://forum.odroid.com/viewtopic.php?f=138&t=24849

JeonghwaCho commented 7 years ago

Hi kroylar, Last week, relevant commits have been merged on HK's github, and as we did double check, the issue is fixed with the following ones.

https://github.com/hardkernel/linux/commit/f2bb8119b477a80571904efeca4969a142a1f13c https://github.com/hardkernel/linux/commit/2bf71df5c61bbb32e46787e1d2eff3e7f67679a4 https://github.com/hardkernel/linux/commit/10fb40277a92eeaf68e826f375d0ba51f583e39e