<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - HDMI not working on Skylake with EDID read error" href="https://bugs.freedesktop.org/show_bug.cgi?id=109273#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - HDMI not working on Skylake with EDID read error" href="https://bugs.freedesktop.org/show_bug.cgi?id=109273">bug 109273</a> from <a class="email" href="mailto:glogow@fbihome.de" title="Jan-Marek Glogowski <glogow@fbihome.de>"> Jan-Marek Glogowski</a> <pre>(In reply to <a href="mailto:shashank.sharma@intel.com">shashank.sharma@intel.com</a> from <a href="show_bug.cgi?id=109273#c3">comment #3</a>) > From the logs I can see that these 2 devices have different type of adapters: > > Looks like the type-1 adapter is not responding to i2c-over-aux reads after > one power-down, which is causing the HDMI monitor detection and EDID read > failure, and driver is assuming there is no HDMI connected, causing blank on > the screen. All I found about "type-1" and "type-2" is that the first is just some passive stuff, while the 2nd is real. I had a look at do_gmbus_xfer and it does some clock gating for newer HW. But I don't know how all this stuff should work together. As you can see, no change for drm-tip. I booted with HDMI already connected, so there is no plug + unplug in the log. (In reply to Ville Syrjala from <a href="show_bug.cgi?id=109273#c5">comment #5</a>) > Looks like the E756 adapter is simply broken. Do you have another machine > where you could test that adapter? I was told it works with Windows, but that was quite some time ago. The adapter is build-in. I can probably organize a Windows install on that machine to verify, if it really works, if you suspect it's a hardware problem. Anything else to test before doing the OS swap twice? It'll probably take a day.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>