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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [HSW bisected]igt/module_reload causes [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 44004 and system hang with headless, with power well disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67813#c16">Comment # 16</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [HSW bisected]igt/module_reload causes [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 44004 and system hang with headless, with power well disabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=67813">bug 67813</a>
from <span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span></b>
<pre>I added drm.debug=0xe.
# lsmod
Module Size Used by
dm_mod 58278 0
iTCO_wdt 4535 1
iTCO_vendor_support 1584 1 iTCO_wdt
snd_hda_codec_realtek 32195 1
pcspkr 1675 0
i2c_i801 8342 0
lpc_ich 12616 0
mfd_core 2401 1 lpc_ich
snd_hda_intel 24636 0
snd_hda_codec 98736 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 5141 1 snd_hda_codec
snd_pcm 66617 2 snd_hda_codec,snd_hda_intel
snd_page_alloc 5906 2 snd_pcm,snd_hda_intel
snd_timer 15318 1 snd_pcm
snd 50129 6
snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_hda_codec,snd_hda_intel
soundcore 4210 1 snd
battery 10931 0
ac 3999 0
acpi_cpufreq 6339 0
i915 529852 1
video 11092 1 i915
button 4333 1 i915
drm_kms_helper 22788 1 i915
drm 195808 2 i915,drm_kms_helper
mperf 1027 1 acpi_cpufreq
freq_table 2092 1 acpi_cpufreq</pre>
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