<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL bisected] System freeze when starting X using kernel 4.9-rc1 or later" href="https://bugs.freedesktop.org/show_bug.cgi?id=98690#c26">Comment # 26</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL bisected] System freeze when starting X using kernel 4.9-rc1 or later" href="https://bugs.freedesktop.org/show_bug.cgi?id=98690">bug 98690</a> from <a class="email" href="mailto:gleb@fastmail.com" title="Gleb Nemshilov <gleb@fastmail.com>"> Gleb Nemshilov</a> <pre>Could it be the runpm related issue? Because with "nouveau.runpm=0" kernel boots fine (as stated in another bug report I reported here with the same issue). I can see with dmesg the following strings: ===kernel booted=== ===these lines below means runpm turned off discrete adapter=== [62233.697650] nouveau 0000:02:00.0: DRM: suspending console... [62233.697656] nouveau 0000:02:00.0: DRM: suspending display... [62233.697673] nouveau 0000:02:00.0: DRM: evicting buffers... [62233.697676] nouveau 0000:02:00.0: DRM: waiting for kernel channels to go idle... [62233.697711] nouveau 0000:02:00.0: DRM: suspending client object trees... [62233.698025] nouveau 0000:02:00.0: DRM: suspending kernel object tree... ===these lines appear when the discrete GPU is tunred on=== [63751.307103] nouveau 0000:02:00.0: DRM: resuming kernel object tree... [63751.539847] nouveau 0000:02:00.0: DRM: resuming client object trees... [63751.539975] nouveau 0000:02:00.0: DRM: resuming display... [63751.539999] nouveau 0000:02:00.0: DRM: resuming console... It's also strange that those lines appear long after the system started, because the GPU should be turned off all the time. As I understand, "suspending" stuff means that discrete GPU is truned off, and "resuming" means it turns on. So when the affected kernel boots, the last line is "DRM: resuming console..." and it's stuck, X server won't load. But with not affected kernel the last lines are "DRM: suspending client object trees..." and "DRM: suspending kernel object tree...".</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>