<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW] GPU hung when start X, if without drm.debug=0xe" href="https://bugs.freedesktop.org/show_bug.cgi?id=58899#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - [HSW] GPU hung when start X, if without drm.debug=0xe" href="https://bugs.freedesktop.org/show_bug.cgi?id=58899">bug 58899</a> from <a class="email" href="mailto:yi.sun@intel.com" title="Yi Sun <yi.sun@intel.com>"> Yi Sun</a> <pre>(In reply to <a href="show_bug.cgi?id=58899#c11">comment #11</a>) > Yi, can we locate the specific kernel branch, the try bisecting? By quick investigation, I got little confused. First, this issue only happen on Ubuntu OS, I didn't reproduce on the Fedora. Second, on Ubuntu, I found that issue is related to the order of kernel command. For example: a. BOOT_IMAGE=/boot/vmlinuz-3.7.0-rc7+ root=UUID=452d1dd9-ee6a-451b-8330-8d4a5595f851 ro quiet splash text drm.debug=0xe b. BOOT_IMAGE=/boot/vmlinuz-3.7.0-rc7+ root=UUID=452d1dd9-ee6a-451b-8330-8d4a5595f851 drm.debug=0xe ro quiet splash text Boot system with command b can trigger this issue, but command b can't</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>