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<body><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> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - [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>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>RESOLVED
</td>
<td>REOPENED
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>FIXED
</td>
<td>---
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - [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#c60">Comment # 60</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - [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>Test on latest -nightly kernel, i915 is in use. Test on latest -queued kernel,
error still exists.
output(nightly kernel)
rmmod: ERROR: Module i915 is in use
WARNING: i915.ko still loaded!
module successfully loaded again
lsmod(nightly kenrel)
Module Size Used by
snd_hda_intel 15258 0
ip6table_filter 1067 0
ip6_tables 13864 1 ip6table_filter
ipv6 253295 24
iptable_filter 1112 0
ip_tables 13467 1 iptable_filter
ebtable_nat 1529 0
ebtables 19258 1 ebtable_nat
x_tables 13403 5
ip6table_filter,ip_tables,iptable_filter,ebtables,ip6_tables
dm_mod 67053 0
snd_hda_codec_realtek 46034 1
snd_hda_codec_generic 38382 1 snd_hda_codec_realtek
iTCO_wdt 4695 0
iTCO_vendor_support 1624 1 iTCO_wdt
snd_hda_codec_hdmi 31910 1
serio_raw 3929 0
pcspkr 1715 0
i2c_i801 8397 0
lpc_ich 13312 0
mfd_core 2537 1 lpc_ich
snd_hda_controller 16013 1 snd_hda_intel
snd_hda_codec 71968 5
snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
snd_hwdep 5309 1 snd_hda_codec
snd_pcm 69054 4
snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_timer 15325 1 snd_pcm
snd 49512 8
snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
soundcore 4178 2 snd,snd_hda_codec
battery 12312 0
wmi 6915 0
tpm_infineon 6274 0
tpm_tis 6884 0
tpm 18810 2 tpm_tis,tpm_infineon
acpi_cpufreq 5906 0
i915 720378 3
video 11915 1 i915
button 4229 1 i915
drm_kms_helper 27746 1 i915
drm 206876 3 i915,drm_kms_helper
Test on latest -queued kernel:
output:
module successfully unloaded
module successfully loaded again
dmesg -r | egrep "<[1-3]>" |grep drm
<3>[ 31.720889] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed
register before writing to 209c
<3>[ 31.726335] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed
register before writing to a090
<3>[ 31.945258] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed
register before writing to a090
<3>[ 31.951119] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed
register before writing to 45404</pre>
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