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<body><span class="vcard"><a class="email" href="mailto:corsac@debian.org" title="Yves-Alexis <corsac@debian.org>"> <span class="fn">Yves-Alexis</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</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>CLOSED
</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 - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c93">Comment # 93</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a>
from <span class="vcard"><a class="email" href="mailto:corsac@debian.org" title="Yves-Alexis <corsac@debian.org>"> <span class="fn">Yves-Alexis</span></a>
</span></b>
<pre>I just had a chance to test 4.18 and I have to say it's *not* fixed. Maybe it's
a different bug, but in any case I had a “soft” freeze with following message
in dmesg:
Aug 29 19:04:17 scapa kernel: [ 26.943249] DMAR: DRHD: handling fault status
reg 3
Aug 29 19:04:17 scapa kernel: [ 26.943255] DMAR: [DMA Read] Request device
[00:02.0] fault addr 4600000 [fault reason 23] Unknown
Aug 29 19:04:17 scapa kernel: [ 26.943259] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:04:17 scapa kernel: [ 26.943262] DMAR: [DMA Read] Request device
[00:02.0] fault addr 4613000 [fault reason 23] Unknown
Aug 29 19:04:17 scapa kernel: [ 26.943264] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:04:17 scapa kernel: [ 26.943267] DMAR: [DMA Read] Request device
[00:02.0] fault addr 461b000 [fault reason 23] Unknown
Aug 29 19:04:17 scapa kernel: [ 26.943269] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:04:24 scapa kernel: [ 33.831279] [drm] GPU HANG: ecode
8:0:0x85dffffb, in Xorg [1028], reason: hang on rcs0, action: reset
Aug 29 19:04:24 scapa kernel: [ 33.831280] [drm] GPU hangs can indicate a bug
anywhere in the entire gfx stack, including userspace.
Aug 29 19:04:24 scapa kernel: [ 33.831281] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Aug 29 19:04:24 scapa kernel: [ 33.831281] [drm] drm/i915 developers can then
reassign to the right component if it's not a kernel issue.
Aug 29 19:04:24 scapa kernel: [ 33.831282] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Aug 29 19:04:24 scapa kernel: [ 33.831282] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Aug 29 19:04:24 scapa kernel: [ 33.831298] i915 0000:00:02.0: Resetting rcs0
for hang on rcs0
Aug 29 19:04:24 scapa kernel: [ 33.838481] dmar_fault: 53 callbacks
suppressed
Aug 29 19:04:24 scapa kernel: [ 33.838482] DMAR: DRHD: handling fault status
reg 3
Aug 29 19:04:24 scapa kernel: [ 33.838487] DMAR: [DMA Write] Request device
[00:02.0] fault addr 4641000 [fault reason 23] Unknown
Aug 29 19:04:32 scapa kernel: [ 41.824158] i915 0000:00:02.0: Resetting rcs0
for hang on rcs0
Aug 29 19:04:32 scapa kernel: [ 41.824723] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:04:32 scapa kernel: [ 41.824729] DMAR: [DMA Write] Request device
[00:02.0] fault addr 17f000 [fault reason 23] Unknown
Aug 29 19:04:40 scapa kernel: [ 49.813478] i915 0000:00:02.0: Resetting rcs0
for hang on rcs0
Aug 29 19:04:48 scapa kernel: [ 57.804899] i915 0000:00:02.0: Resetting rcs0
for hang on rcs0
Aug 29 19:04:56 scapa kernel: [ 65.799728] i915 0000:00:02.0: Resetting rcs0
for hang on rcs0
Aug 29 19:04:56 scapa kernel: [ 65.882208] wlan0: deauthenticating from
14:0c:76:bf:71:fc by local choice (Reason: 3=DEAUTH_LEAVING)
Aug 29 19:04:56 scapa kernel: [ 65.902446] IPv6: ADDRCONF(NETDEV_UP): wlan0:
link is not ready
Aug 29 19:04:57 scapa kernel: [ 66.510770] DMAR: DRHD: handling fault status
reg 3
Aug 29 19:04:57 scapa kernel: [ 66.510778] DMAR: [DMA Write] Request device
[00:02.0] fault addr fffc6000 [fault reason 23] Unknown
Aug 29 19:04:57 scapa kernel: [ 66.510781] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:04:57 scapa kernel: [ 66.510784] DMAR: [DMA Write] Request device
[00:02.0] fault addr 4d000 [fault reason 23] Unknown
Aug 29 19:04:57 scapa kernel: [ 66.510788] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:04:57 scapa kernel: [ 66.510791] DMAR: [DMA Write] Request device
[00:02.0] fault addr 51000 [fault reason 23] Unknown
Aug 29 19:04:57 scapa kernel: [ 66.510802] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:02 scapa kernel: [ 71.509221] dmar_fault: 6733586 callbacks
suppressed
Aug 29 19:05:02 scapa kernel: [ 71.509222] DMAR: DRHD: handling fault status
reg 3
Aug 29 19:05:02 scapa kernel: [ 71.509230] DMAR: [DMA Write] Request device
[00:02.0] fault addr 32ff4b000 [fault reason 23] Unknown
Aug 29 19:05:02 scapa kernel: [ 71.509233] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:02 scapa kernel: [ 71.509236] DMAR: [DMA Write] Request device
[00:02.0] fault addr 32ff53000 [fault reason 23] Unknown
Aug 29 19:05:02 scapa kernel: [ 71.509239] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:02 scapa kernel: [ 71.509241] DMAR: [DMA Write] Request device
[00:02.0] fault addr 32ff57000 [fault reason 23] Unknown
Aug 29 19:05:02 scapa kernel: [ 71.509244] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:07 scapa kernel: [ 76.511769] dmar_fault: 6751341 callbacks
suppressed
Aug 29 19:05:07 scapa kernel: [ 76.511770] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:07 scapa kernel: [ 76.511775] DMAR: [DMA Write] Request device
[00:02.0] fault addr 66e6bc000 [fault reason 23] Unknown
Aug 29 19:05:07 scapa kernel: [ 76.511778] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:07 scapa kernel: [ 76.511781] DMAR: [DMA Write] Request device
[00:02.0] fault addr 66e6c3000 [fault reason 23] Unknown
Aug 29 19:05:07 scapa kernel: [ 76.511784] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:07 scapa kernel: [ 76.511787] DMAR: [DMA Write] Request device
[00:02.0] fault addr 66e6c8000 [fault reason 23] Unknown
Aug 29 19:05:07 scapa kernel: [ 76.511790] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:12 scapa kernel: [ 81.514717] dmar_fault: 6802731 callbacks
suppressed
Aug 29 19:05:12 scapa kernel: [ 81.514718] DMAR: DRHD: handling fault status
reg 3
Aug 29 19:05:12 scapa kernel: [ 81.514722] DMAR: [DMA Write] Request device
[00:02.0] fault addr 9ade03000 [fault reason 23] Unknown
Aug 29 19:05:12 scapa kernel: [ 81.514725] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:12 scapa kernel: [ 81.514728] DMAR: [DMA Write] Request device
[00:02.0] fault addr 9ade0a000 [fault reason 23] Unknown
Aug 29 19:05:12 scapa kernel: [ 81.514731] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:12 scapa kernel: [ 81.514733] DMAR: [DMA Write] Request device
[00:02.0] fault addr 9ade0e000 [fault reason 23] Unknown
Aug 29 19:05:12 scapa kernel: [ 81.514736] DMAR: DRHD: handling fault status
reg 2
Aug 29 19:05:12 scapa kernel: [ 81.794708] i915 0000:00:02.0: Resetting rcs0
for no progress on rcs0
Aug 29 19:05:20 scapa kernel: [ 89.793873] i915 0000:00:02.0: Resetting chip
for hang on rcs0
Aug 29 19:05:20 scapa kernel: [ 89.793938] i915 0000:00:02.0: GPU recovery
failed
Unfortunately because of the soft freeze I didn't have a chance to recover
/sys/class/drm/card0/error. But the hang happened pretty soon after boot on my
broadwell CPU, pretty much as soon as I enabled the external screen when logged
on the desktop.</pre>
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