<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [bdw-u iommu] DMAR error -> GPU hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [bdw-u iommu] DMAR error -> GPU hang" href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a> from <a class="email" href="mailto:matthias.h.nagel@gmail.com" title="Matthias Nagel <matthias.h.nagel@gmail.com>"> Matthias Nagel</a> <pre>I found the same problem as in <a href="show_bug.cgi?id=89360#c4">comment #4</a>. If I disable VT-d in the BIOS the crashes disappear. But then I get random segmentation faults from GCC if I try to compile QtWebKit (N.b: I have gentoo and compile all packages by myself.) Hence, I have two options (1) Disable VT-d for daily work such that i915 does not crash (2) Enable VT-d and only boot into text console mode if I need to compile QtWebKit My hardware is Lenovo Thinkpad X1 Carbon (3rd generation, type 20BT) Processor Intel Core i5-5200U Memory: 8 GB PC3-12800L BIOS: Phoenix, ver. 1.09, 7/22/2015 Interestingly, MemTest86 does not report any memory error in either case (with and without VT-d)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>