<div dir="ltr"><div class="gmail_default"><div class="gmail_default"><font face="monospace, monospace">Also on <a href="http://bugzilla.kernel.org">bugzilla.kernel.org</a>:</font></div><div class="gmail_default"><font face="monospace, monospace"><a href="https://bugzilla.kernel.org/show_bug.cgi?id=196297">https://bugzilla.kernel.org/show_bug.cgi?id=196297</a><br></font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace">Setup and brief environment:</font></div><div class="gmail_default"><font face="monospace, monospace"> - Kernel 4.12.0 - vanilla, no patches</font></div><div class="gmail_default"><font face="monospace, monospace"> - Dual-monitor setup</font></div><div class="gmail_default"><font face="monospace, monospace"> - Monitor 1:</font></div><div class="gmail_default"><font face="monospace, monospace"> - Dell U3011 30-inch 2560x1600 over DVI-I</font></div><div class="gmail_default"><font face="monospace, monospace"> - Never has a problem</font></div><div class="gmail_default"><font face="monospace, monospace"> - Monitor 2:</font></div><div class="gmail_default"><font face="monospace, monospace"> - Seiki SE39UY04 (TV) over DisplayPort @3840x2160</font></div><div class="gmail_default"><font face="monospace, monospace"> - Has a problem ONLY when monitor is SWITCHED OFF AND ON AGAIN</font></div><div class="gmail_default"><font face="monospace, monospace"> - Graphics card:</font></div><div class="gmail_default"><font face="monospace, monospace"> - GeForce GTX 750Ti 2GB GDDR5 128bit, Dual-Link DVI-I, HDMI, DP 1.2 Graphics Card</font></div><div class="gmail_default"><font face="monospace, monospace"> - eVGA 02G-P4-3753-KR</font></div><div class="gmail_default"><font face="monospace, monospace"> - eVGA link: <a href="http://www.evga.com/Products/Product.aspx?pn=02G-P4-3753-KR">http://www.evga.com/Products/Product.aspx?pn=02G-P4-3753-KR</a></font></div><div class="gmail_default"><font face="monospace, monospace"> - Seiki monitor EDID:</font></div><div class="gmail_default"><font face="monospace, monospace"> - The monitor has a bad EDID - see attached orig_edid.bin</font></div><div class="gmail_default"><font face="monospace, monospace"> - I have a modified EDID file - see attached edid2.bin with ONLY the</font></div><div class="gmail_default"><font face="monospace, monospace"> correct resolution</font></div><div class="gmail_default"><font face="monospace, monospace"> - I use video=DP-1:3840x2160 drm_kms_helper.edid_firmware=DP-1:edid/edid2.bin</font></div><div class="gmail_default"><font face="monospace, monospace"> to specify the exact resolution and use my custom EDID file</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace">What works (perfectly):</font></div><div class="gmail_default"><font face="monospace, monospace"> - Both monitors startup at full resolution</font></div><div class="gmail_default"><font face="monospace, monospace"> - xorg starts up at full resolution on both monitors</font></div><div class="gmail_default"><font face="monospace, monospace"> - Monitor 1 (Dell U3011) NEVER has any problem</font></div><div class="gmail_default"><font face="monospace, monospace"> - While booting, nouveau finds and uses my custom EDID file</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace">Problem:</font></div><div class="gmail_default"><font face="monospace, monospace"> - When DPMS kicks in, the Dell U3011 monitor goes to sleep (normal) and</font></div><div class="gmail_default"><font face="monospace, monospace"> the Seiki monitor shows 'No Signal' on the screen</font></div><div class="gmail_default"><font face="monospace, monospace"> - About 15 mins after DPMS kicks in, the Seiki monitor switches off</font></div><div class="gmail_default"><font face="monospace, monospace"> - The Seiki monitor has to be manually switched on with the power button</font></div><div class="gmail_default"><font face="monospace, monospace"> - This behavior cannot be changed - no setting for this on the monitor</font></div><div class="gmail_default"><font face="monospace, monospace"> - When I switch the Seiki monitor ON, the screen will be blank and</font></div><div class="gmail_default"><font face="monospace, monospace"> 'xrandr -q' shows it as disconnected</font></div><div class="gmail_default"><font face="monospace, monospace"> - When I switch to a virtual console (using CTRL-ALT-F1), the following message appears</font></div><div class="gmail_default"><font face="monospace, monospace"> on the console:</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace">Jul 7 23:34:28 smaug kernel: [ 8340.750889] nouveau 0000:03:00.0: disp: outp 03:0006:0f42: link training failed</font></div><div class="gmail_default"><font face="monospace, monospace">Jul 7 23:34:28 smaug kernel: [ 8340.750940] nouveau 0000:03:00.0: disp: outp 03:0006:0f42: link not trained before attach</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace"> - This message appears ONLY when I switch to the virtual console, and NOT until then</font></div><div class="gmail_default"><font face="monospace, monospace"> - When the monitor is switched on, the attached kernel trace appears in the kernel log</font></div><div class="gmail_default"><font face="monospace, monospace"> - After switching to the virtual console and back to X, the monitor will show</font></div><div class="gmail_default"><font face="monospace, monospace"> a SERIES of garbled screens (probably bad timings, but I am not sure), each</font></div><div class="gmail_default"><font face="monospace, monospace"> lasting about 10-15 secs. After a few MINUTES (perhaps 2-3 minutes),</font></div><div class="gmail_default"><font face="monospace, monospace"> the Seiki monitor will be restored back to full resolution</font></div><div class="gmail_default"><font face="monospace, monospace"> - As the monitor is restored to full resolution, the following message will</font></div><div class="gmail_default"><font face="monospace, monospace"> appear in the kernel log:</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace">Jul 7 23:37:44 smaug kernel: [ 8537.487664] [drm] Got external EDID base block and 1 extension from "edid/edid2.bin" for connector "DP-1"</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace"> - The problem only happens if the Seiki monitor is in the OFF state for QUITE A LONG TIME</font></div><div class="gmail_default"><font face="monospace, monospace"> - E.g., if I turn it back on within 5 mins, the problem does not occur</font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace"><br></font></div><div class="gmail_default"><font face="monospace, monospace">Problem wasn't happening until about 4-5 months ago (when I was using an older kernel version).</font></div><div class="gmail_default"><font face="monospace, monospace">I have gone back to 4.11, but it still happens. Must be a versionolder than that. Unfortunately, I do not remember which version worked, but was a 4.x version.</font></div><div style="font-family:georgia,serif;font-size:large"><br></div><div style="font-family:georgia,serif;font-size:large"><br></div><div style="font-family:georgia,serif;font-size:large"><br></div></div></div>