<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div dir="ltr">I haven't had the exact problem you're having, but I have seen similar issues with suspend. In my case the system would lock up when going to suspend, requiring a power cycle to come back.</div><div id="yui_3_16_0_ym19_1_1460485261134_52627" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1460485261134_52628" dir="ltr">Turned out to be caused by multiple frame buffer drivers being loaded at the same time. I had uvesafb as well as efifb loading at boot. The system worked fine until trying to suspend. I removed uvesafb from the kernel and everything worked fine.<br></div><div id="yui_3_16_0_ym19_1_1460485261134_52614"><span></span></div><div id="yui_3_16_0_ym19_1_1460485261134_52559" class="qtdSeparateBR"><div id="yui_3_16_0_ym19_1_1460485261134_52697">Just a thought,</div><div id="yui_3_16_0_ym19_1_1460485261134_52698">Markus<br></div><br></div><div style="display: block;" id="yui_3_16_0_ym19_1_1460485261134_52504" class="yahoo_quoted"> <blockquote id="yui_3_16_0_ym19_1_1460485261134_52503" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div id="yui_3_16_0_ym19_1_1460485261134_52502" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1460485261134_52501" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1460485261134_52543" dir="ltr"> <font id="yui_3_16_0_ym19_1_1460485261134_52542" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> "russell.poffenberger@xcerra.com" <russell.poffenberger@xcerra.com><br> <b><span style="font-weight: bold;">To:</span></b> xorg@lists.x.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, April 14, 2016 11:29 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: No video after resume from suspend<br> </font> </div> <div id="yui_3_16_0_ym19_1_1460485261134_52500" class="y_msg_container"><br><div id="yiv7220117187">
<br><font face="sans-serif" size="2">Thanks for the info Thomas.</font>
<br>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52541" face="sans-serif" size="2">ctrl+alt+f2 does not appear to do anything.
I see no visible effects when the display is running normally (before suspend)
nor does it wake the screen after resuming from suspend.</font>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52699" face="sans-serif" size="2">Failsafe mode also fails to restore
the display when resuming.</font>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52700" face="sans-serif" size="2">One odd note I found is that I have
some difficulty with hibernate also. If I attempt to hibernate this system,
it takes about 2 minutes for it to actually go into hibernation. I have
tried many things to see what is going on including booting with parameters
such as ignore_loglevel, initcall_debug, no_console_suspend, etc. but there
are no messages indicating why it takes so long to hibernate.</font>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52701" face="sans-serif" size="2">The funny thing is that if I suspend/resume,
then rlogin to the machine and invoke hibernate, it goes into hibernation
in about 10 seconds. Booting and restoring from hibernation restores everything
(including the screen) right where it ought to be.</font>
<br>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52702" face="sans-serif" size="2">My workaround for now is to make a script
with the following commands</font>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52703" face="sans-serif" size="2">rtcwake -m mem -s 5;systemctl hibernate</font>
<br><font face="sans-serif" size="2">Although it takes longer to recover
than suspend/resume, it is within acceptable parameters.</font>
<br>
<br><font id="yui_3_16_0_ym19_1_1460485261134_52704" face="sans-serif" size="2">-----------------------------------------------------<br>
Russ Poffenberger | System Architecture Group<br>
Phone: +1 / 408 / 635-6049<br>
russell.poffenberger@xcerra.com<br>
Xcerra Corporation, LTX/Credence Division<br>
1355 California Circle<br>
Milpitas, CA 95035, USA<br>
-----------------------------------------------------</font>
<br>
<br>
<br>
<table class="yahoo-compose-table-card" width="100%">
<tbody><tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">From:</font>
</td><td><font face="sans-serif" size="1">Thomas Lübking <thomas.luebking@gmx.de></font>
</td></tr><tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">To:</font>
</td><td><font face="sans-serif" size="1">russell.poffenberger@xcerra.com</font>
</td></tr><tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Date:</font>
</td><td><font face="sans-serif" size="1">04/14/2016 03:47 AM</font>
</td></tr><tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Subject:</font>
</td><td><font face="sans-serif" size="1">Re: No video after resume from suspend</font></td></tr></tbody></table>
<br>
<hr noshade="">
<br>
<br>
<br><tt><font size="2">On Wed, Apr 13, 2016 at 05:44:27PM -0700, russell.poffenberger@xcerra.com
wrote:<br>
>When I put the system to sleep, after resuming from sleep, the system<br>
>comes alive (I can rlogin fine), but there is no video signal, as reported<br>
>by the monitor and a blank display. No amount of pressing keys or moving<br>
>the mouse have any effect.<br>
<br>
Can you switch to another VT (ctrl+alt+f2) and does the framebuffer<br>
change get you a signal?<br>
<br>
>Is there something I can send or do to wake the video up, at least
to try<br>
>and understand what is not resuming properly?<br>
<br>
No idea whether that's related, but at least the nvidia blob has/d trouble<br>
moving data between VRAM and RAM across STR.<br>
<br>
Are you running gnome and does it also happen with a failsafe login?<br>
(Anything that's not a GL composited DE)<br>
<br>
Cheers,<br>
Thomas<br>
</font></tt>
<br>
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