<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - ThinkPad T450: RetroArch refuses to go back into windowed mode after fullscreen" href="https://bugs.freedesktop.org/show_bug.cgi?id=96767#c31">Comment # 31</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED - ThinkPad T450: RetroArch refuses to go back into windowed mode after fullscreen" href="https://bugs.freedesktop.org/show_bug.cgi?id=96767">bug 96767</a> from <a class="email" href="mailto:diego.viola@gmail.com" title="Diego Viola <diego.viola@gmail.com>"> Diego Viola</a> <pre>(In reply to Diego Viola from <a href="show_bug.cgi?id=96767#c30">comment #30</a>) > (In reply to Chris Wilson from <a href="show_bug.cgi?id=96767#c27">comment #27</a>) > > (In reply to Diego Viola from <a href="show_bug.cgi?id=96767#c26">comment #26</a>) > > > (In reply to Chris Wilson from <a href="show_bug.cgi?id=96767#c14">comment #14</a>) > > > > The chvt will cause a modeset which will flush the vblank queue (more > > > > evidence that is a "lost" event in the kernel as opposed to userspace > > > > missing the event enitrely). This will be very noisy, but I wonder if a > > > > drm.debug=0xff dmesg will have a clue (you will probably also need to > > > > increase the dmesg to say log_buf_len=10M) when you hit the hang and then > > > > chvt. > > > > > > Chris, you mentioned this was a possible kernel bug, but I got that commit > > > that is causing this in xf86-video-intel. > > > > > > Do you have any suggestions please? > > > > I've run over 96hours on xf86-video-intel/test/dri2-race that captures all > > of the issues you have hit so far and more. Both xorg-1.18.0 (as > > demonstrated earlier and fixed) and xorg-1.19-rc are buggy. That change just > > moves a spurious early signal to the later pending flip, i.e. expanding the > > race window. It is not the culprit you think it is. > > I think you're right, I went back to Aug. 2015 and I still get these hangs, > going back further I get compile time errors and I can't test anymore. > > It's interesting though that some of those commits are OK and don't hang. > I'm out of ideas. :( Yes, I realize it's a bug in the kernel, and it sucks nobody is doing anything about them. What I'm saying is that maybe you'll be able to alleviate by using modesetting/glamor as it probably uses different functions than xf86-video-intel. Although that is more of a workaround right now, and it has worked for me.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>