<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [IVB CPU eDP] local flat panel stays blank, workaround: intel_iommu=igfx_off" href="https://bugs.freedesktop.org/show_bug.cgi?id=48652#c113">Comment # 113</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [IVB CPU eDP] local flat panel stays blank, workaround: intel_iommu=igfx_off" href="https://bugs.freedesktop.org/show_bug.cgi?id=48652">bug 48652</a> from <a class="email" href="mailto:bug-track@fisher-privat.net" title="Oleksij Rempel <bug-track@fisher-privat.net>"> Oleksij Rempel</a> <pre>After your comment i did some more tests -- just in case. Enabled VT-d and removed intel_iommu=igfx_off line. Result is really interesting: I get oops only on second boot without igfx_off. First boot without igfx_off is ok, both displays are working, but after power off and new start with same configuration - without igfx_off kernel it will oops. Other Zenbook had similar problem with suspend. After some suspend issue it wasn't able to boot. Reason - memory corruption. May be some thing similar is happening here. And some controller stay confused after power off with not setted "intel_iommu=igfx_off".</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>