<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [AMD tahiti XT] displayport broken" href="https://bugs.freedesktop.org/show_bug.cgi?id=107784#c22">Comment # 22</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [AMD tahiti XT] displayport broken" href="https://bugs.freedesktop.org/show_bug.cgi?id=107784">bug 107784</a> from <a class="email" href="mailto:demfloro@demfloro.ru" title="Dmitrii Tcvetkov <demfloro@demfloro.ru>"> Dmitrii Tcvetkov</a> <pre>(In reply to Dmitrii Tcvetkov from <a href="show_bug.cgi?id=107784#c21">comment #21</a>) > (In reply to Sylvain BERTRAND from <a href="show_bug.cgi?id=107784#c20">comment #20</a>) > > Roughly, if you have a cpu with a frequency above 4.2GHz (max unsigned > > 32bits), > > linux time subsystem gets broken leading to the timeouts in displayport > > programming. Ofc, my cpu runs at 4.7GHz. > > I hit the bug on AMD FX-9590 machine with RX 580 and 2 displayport monitors. > As for you bisect wasn't successful for me and led me to network merge > commit. > > Looks like you're right! If I downclock the CPU to 4.2 GHz then current > mainline master (f8f65382c98a28e3c2b20) boots fine. Relevant discussion about cf7a63ef4e0203f (x86/tsc: Calibrate tsc only once) <a href="http://lkml.iu.edu/hypermail/linux/kernel/1809.0/03226.html">http://lkml.iu.edu/hypermail/linux/kernel/1809.0/03226.html</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>