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<head>
<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BDW]Piglit spec_glsl-1.50_execution_geometry_max-input-components sporadically fail and causes WARNING drivers/gpu/drm/i915/intel_uncore.c:528 hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81656">81656</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW]Piglit spec_glsl-1.50_execution_geometry_max-input-components sporadically fail and causes WARNING drivers/gpu/drm/i915/intel_uncore.c:528 hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg CVS
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=103314" name="attach_103314" title="dmesg">attachment 103314</a> <a href="attachment.cgi?id=103314&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Platform: BDW
Libdrm:
(master)libdrm-2.4.54-19-gc0b34dca2632a774249cfa3b969c3f7ce9df33e1
Mesa: (master)9548ba6e7bb8e631f6ef6236f7425725239742fe
Xserver:
(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113a5f10a
Xf86_video_intel:(master)2.99.912-248-gbfccacf745d054756661be3edd8898ac6aceb878
Libva: (master)3fddb7f937df4e0e15391bd65ae3c7552ea5b3d7
Libva_intel_driver:(master)c5cb17ea86f0065a939d3636dd26651c93d497c8
Kernel: (drm-intel-nightly)d62845db2ec40e15a76e5d5ebfe1a039ea2538c4
Bug detailed description:
---------------------------
It fails on BDW with -nightly and -queued kernel. On -fixes kernel, It also
fails, but does not report WARNING.
It happens 3 in 5 runs. If this fail appears, it will impact other Piglit
cases.
output:
WARNING: May need to implement a temporary workaround: GS Number of URB Entries
must be less than or equal to the GS Maximum Number of Threads.
Probe color at (0,0)
Expected: 0.000000 1.000000 0.000000 1.000000
Observed: 0.000000 0.000000 0.000000 0.000000
PIGLIT: {"result": "fail" }
dmesg(add i915.mmio_debug=1)
[ 40.195585] WARNING: CPU: 1 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]()
[ 40.195587] Unclaimed register detected after reading register 0x4400c
[ 40.195589] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support
snd_hda_codec_hdmi pcspkr snd_hda_intel snd_hda_controller snd_hda_codec
snd_hwdep snd_pcm i2c_i801 lpc_ich mfd_core snd_timer snd soundcore ppdev
battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
[ 40.195611] CPU: 1 PID: 0 Comm: swapper/1 Not tainted
3.16.0-rc5_drm-intel-nightly_873440_20140720_debug+ #658
[ 40.195612] 0000000000000009 ffff88014e443af8 ffffffff8182f83f
0000000000000046
[ 40.195616] ffff88014e443b48 ffff88014e443b38 ffffffff8103fa1c
ffff88014e443b88
[ 40.195620] ffffffffa00be1af ffff8800030b0060 ffff8800030b0000
ffff8800030b0068
[ 40.195623] Call Trace:
[ 40.195625] <IRQ> [<ffffffff8182f83f>] dump_stack+0x46/0x58
[ 40.195634] [<ffffffff8103fa1c>] warn_slowpath_common+0x81/0x9b
[ 40.195652] [<ffffffffa00be1af>] ?
hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e [i915]
[ 40.195655] [<ffffffff8103fad9>] warn_slowpath_fmt+0x46/0x48
[ 40.195673] [<ffffffffa00be1af>] hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e
[i915]
[ 40.195688] [<ffffffffa00be387>] gen6_read32+0xb0/0x116 [i915]
[ 40.195704] [<ffffffffa00a9be7>] i915_capture_error_state+0x296/0x12b3
[i915]
[ 40.195708] [<ffffffff81390b99>] ? vsnprintf+0x76/0x3c2
[ 40.195723] [<ffffffffa00b0b3a>] i915_handle_error+0x81/0x5c6 [i915]
[ 40.195726] [<ffffffff8182c13a>] ? printk+0x4d/0x4f
[ 40.195742] [<ffffffffa00b3296>] i915_hangcheck_elapsed+0x36e/0x38e [i915]
[ 40.195755] [<ffffffffa00b2f28>] ? cherryview_irq_handler+0xfa/0xfa [i915]
[ 40.195760] [<ffffffff81049f42>] call_timer_fn+0x97/0x15a
[ 40.195763] [<ffffffff81049eb0>] ? call_timer_fn+0x5/0x15a
[ 40.195776] [<ffffffffa00b2f28>] ? cherryview_irq_handler+0xfa/0xfa [i915]
[ 40.195780] [<ffffffff8104a4fd>] run_timer_softirq+0x1ed/0x252
[ 40.195784] [<ffffffff81043ad9>] __do_softirq+0x115/0x294
[ 40.195788] [<ffffffff81043e4b>] irq_exit+0x44/0x9a
[ 40.195791] [<ffffffff81839abb>] smp_apic_timer_interrupt+0x45/0x52
[ 40.195795] [<ffffffff8173188b>] ? cpuidle_enter_state+0x49/0xbd
[ 40.195798] [<ffffffff81837eef>] apic_timer_interrupt+0x6f/0x80
[ 40.195799] <EOI> [<ffffffff8173188b>] ? cpuidle_enter_state+0x49/0xbd
[ 40.195804] [<ffffffff81731897>] ? cpuidle_enter_state+0x55/0xbd
[ 40.195807] [<ffffffff81731893>] ? cpuidle_enter_state+0x51/0xbd
[ 40.195810] [<ffffffff817319aa>] cpuidle_enter+0x17/0x19
[ 40.195813] [<ffffffff810779fe>] cpu_startup_entry+0x233/0x371
[ 40.195818] [<ffffffff81027bfc>] start_secondary+0x1c2/0x1c7
[ 40.195820] ---[ end trace ec32987ce108221a ]---
[ 40.195822] ------------[ cut here ]------------
Reproduce steps:
-------------------------
1. xinit
2. bin/shader_runner
tests/spec/glsl-1.50/execution/geometry/max-input-components.shader_test -auto</pre>
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