<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [drm:hsw_unclaimed_reg_detect.isra.12] *ERROR* Unclaimed register detected." href="https://bugs.freedesktop.org/show_bug.cgi?id=89901#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [drm:hsw_unclaimed_reg_detect.isra.12] *ERROR* Unclaimed register detected." href="https://bugs.freedesktop.org/show_bug.cgi?id=89901">bug 89901</a> from <a class="email" href="mailto:yorgos.v@gmail.com" title="Georgios Varisteas <yorgos.v@gmail.com>"> Georgios Varisteas</a> <pre>So I've been running without any crash or even a dmesg entry. I even played a Steam video game. I did a few things and don't know which did it, maybe all of them. 1) First I noticed I had xorg compiled with glamor support and the intel driver without. Re compiled both without glamor completely. I also removed UXA support from the intel driver. 2) In xorg.conf I added Option "TearFree" "true" and removed Option "DebugFlushBatches" "true" The complete entry now is: Section "Device" Identifier "intel5500" Driver "intel" Option "RenderAccel" "true" Option "AccelDFS" "true" Option "Monitor-LVDS1" "eDP1" Option "AccelMethod" "sna" Option "TearFree" "true" EndSection 2) I also changed some seemingly related configuration in the kernel: Processor type and features ---> [ ] Enable MPS table # probably set from the stock configuration Graphics support ---> (1) Maximum number of GPUs # used to be 16 by default Direct Rendering Manager (XFree86 4.1.0 and higher DRI support) ---> [ ] Allow to specify an EDID data set instead of probing for it # also set by default [ ] Enable preliminary support for prerelease Intel hardware by default # set by default! Backlight & LCD device support ---> <*> Generic GPIO based Backlight Driver # previously not set, only generic Sound card support ---> Advanced Linux Sound Architecture ---> [*] Dynamic device file minor numbers # was not set 3) Finally I appended the following to my kernel options: acpi_osi=Linux acpi_backlight=vendor NOTE: I also tried to add i915.semaphores=1 to the kernel which every time resulted in a quick system freeze right after submitting credentials to KDM and before even fully loading any KDE modules.</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>