<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)" href="https://bugs.freedesktop.org/show_bug.cgi?id=97620#c7">Comment # 7</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [REGRESSION] KMS having issues after kernel upgrade (4.5.1-1 to 4.6.4-1)" href="https://bugs.freedesktop.org/show_bug.cgi?id=97620">bug 97620</a> from <a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> Ilia Mirkin</a> <pre>Hrmph. Well it looks like your GPU just goes nuts. [ 9.933619] nouveau 0000:01:00.0: bus: MMIO write of 00000002 FAULT at 13b154 [ IBUS ] [ 9.936957] nouveau 0000:01:00.0: bus: MMIO write of 00000000 FAULT at 61019c [ IBUS ] followed by a ton more 610xxx errors. 610xxx is PDISPLAY stuff, but 13b154 is in PXBAR.GPC_*. I also can't find any way that we'd be writing to that register, at least nothing too direct. Something we do greatly upsets the chip though. I looked through the nouveau changes between 4.5 and 4.6, and while there was a ton of stuff, nothing jumps out at me. Can you do a git bisect on the kernel between v4.5 and v4.6 (you can restrict it to drivers/gpu/drm/nouveau) to figure out which change killed it? Separately, you could see if it magically got fixed in v4.7 or v4.8-rcN.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>