<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_REOPENED " title="REOPENED --- - screen goes blank, Linux hangs - Radeon 7870, Gallium, Glamor" href="https://bugs.freedesktop.org/show_bug.cgi?id=65963#c21">Comment # 21</a> on <a class="bz_bug_link bz_status_REOPENED " title="REOPENED --- - screen goes blank, Linux hangs - Radeon 7870, Gallium, Glamor" href="https://bugs.freedesktop.org/show_bug.cgi?id=65963">bug 65963</a> from <a class="email" href="mailto:paul.woegerer@gmail.com" title="paul.woegerer@gmail.com">paul.woegerer@gmail.com</a> <pre>(In reply to <a href="show_bug.cgi?id=65963#c20">comment #20</a>) > (In reply to <a href="show_bug.cgi?id=65963#c19">comment #19</a>) > > @Damian, I had the same problems. My configuration is similar to yours: > > Radeon 7870, Linux 3.16.1, xorg 1.16, MESA 10.3 RC1 (fedora f21 branch). > > > > After consulting <a href="https://wiki.archlinux.org/index.php/ATI">https://wiki.archlinux.org/index.php/ATI</a> it tried adding > > radeon.dpm=0 to my kernel command line as a workaround. It solved the > > problem. No more lockups. The system is now stable with the above > > configuration. Clearly this has something to do with the powermanagement > > changes in MESA and the kernel (there were no lockups with earlier versions > > of MESA) > > There is no power management code in mesa. Power management is completely > self-contained in the kernel. If you are not getting lockups with dpm > enabled and an older version of mesa, it may be a mesa issue. Hmm, sounds like newer versions of MESA trigger a dormant power management issue in the radeon kernel driver (with certain Pitcairn hardware) ...just speculating. It's a while ago thus I can't tell the exact version of kernel and MESA when I first observed the behavior. All I can say for sure is that now since using radeon.dpm=0 I did not experience a single lockup anymore (which is good enough for me). Is there a way to build the radeon kernel driver with some additional debugging/logging that could help you to understand what's going on ?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>