<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - black screen when trying to enable external VGA screen on Trinity APU laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=78987#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - black screen when trying to enable external VGA screen on Trinity APU laptop" href="https://bugs.freedesktop.org/show_bug.cgi?id=78987">bug 78987</a> from <a class="email" href="mailto:dev@lynxeye.de" title="Lucas Stach <dev@lynxeye.de>"> Lucas Stach</a> <pre>Coming back to this after a long time. Meanwhile the APU is a Richland based chip in the same laptop chassis. Behaviour stays the same. What I found out is that VGA lights up if it is connected at boot up, but when GDM tries to switch modes the ATOMBIOS hang is encountered again. So it seems like disabling the encoder does not work properly and it's not coming back to life when trying to enable it again. I've tried to disable various parts of the encoder disable sequence, but didn't find anything that would make a difference. I would be very glad if someone with some more clue about this than me could take a look at this. Do you need any more traces/registerdumps/infos?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>