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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT BDW] sporadic WARNING: "Device suspended during HW access" during kms_pipe_crc_basic on pipe B/C"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93699">93699</a>
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<tr>
<th>Summary</th>
<td>[BAT BDW] sporadic WARNING: "Device suspended during HW access" during kms_pipe_crc_basic on pipe B/C
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>daniel@ffwll.ch
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>This seems to be a fairly sporadic issue on bdw-ultra. See long-term view for
affected testcases:
/archive/results/CI_IGT_test/igt@<a href="mailto:kms_pipe_crc_basic@read-crc-pipe-b.html">kms_pipe_crc_basic@read-crc-pipe-b.html</a>
/archive/results/CI_IGT_test/igt@<a href="mailto:kms_pipe_crc_basic@read-crc-pipe-c.html">kms_pipe_crc_basic@read-crc-pipe-c.html</a>
I noticed this since it hit one of my own patch series. The testcase itself
passes, it's just dmesg backtrace that's upsetting. Backtrace looks like
[ 308.179223] ------------[ cut here ]------------
[ 308.179292] WARNING: CPU: 1 PID: 6179 at
drivers/gpu/drm/i915/intel_drv.h:1467 gen8_write32+0x230/0x2f0 [i915]()
[ 308.179297] Device suspended during HW access
[ 308.179300] Modules linked in: i915 ax88179_178a i2c_hid
x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
cdc_ncm usbnet mii mei_me mei lpc_ich i2c_designware_platform
i2c_designware_core e1000e sdhci_pci ptp pps_core sdhci_acpi sdhci mmc_core
[last unloaded: i915]
[ 308.179356] CPU: 1 PID: 6179 Comm: kms_pipe_crc_ba Tainted: G U
4.4.0-gfxbench+ #1
[ 308.179361] Hardware name: Intel Corporation Broadwell Client
platform/Wilson Beach SDS, BIOS BDW-E2R1.86C.0095.R09.1410300006 10/30/2014
[ 308.179365] ffffffffa03b8db0 ffff880242d97908 ffffffff813df90c
ffff880242d97950
[ 308.179376] ffff880242d97940 ffffffff810746e1 0000000000045110
ffff880089cf0000
[ 308.179385] ffff8800aa6d67b0 0000000008670a00 ffff880242d97a40
ffff880242d979a0
[ 308.179394] Call Trace:
[ 308.179406] [<ffffffff813df90c>] dump_stack+0x4e/0x82
[ 308.179414] [<ffffffff810746e1>] warn_slowpath_common+0x81/0xc0
[ 308.179419] [<ffffffff81074767>] warn_slowpath_fmt+0x47/0x50
[ 308.179466] [<ffffffffa03226c0>] gen8_write32+0x230/0x2f0 [i915]
[ 308.179491] [<ffffffffa02d3988>] _ilk_disable_lp_wm+0x98/0xd0 [i915]
[ 308.179517] [<ffffffffa02d8ebf>] ilk_program_watermarks+0x3ef/0x880 [i915]
[ 308.179544] [<ffffffffa02d9582>] ilk_initial_watermarks+0x102/0x120 [i915]
[ 308.179594] [<ffffffffa0344c91>] intel_pre_plane_update+0x81/0xf0 [i915]
[ 308.179642] [<ffffffffa0345635>] intel_atomic_commit+0x525/0x17c0 [i915]
[ 308.179652] [<ffffffff8150dc45>] ? drm_atomic_check_only+0x145/0x660
[ 308.179658] [<ffffffff8150d728>] ?
drm_atomic_set_crtc_for_connector+0x38/0xe0
[ 308.179664] [<ffffffff8150e192>] drm_atomic_commit+0x32/0x50
[ 308.179673] [<ffffffff814eb155>] drm_atomic_helper_set_config+0x75/0xb0
[ 308.179680] [<ffffffff814fd090>] drm_mode_set_config_internal+0x60/0x110
[ 308.179687] [<ffffffff81501e26>] drm_mode_setcrtc+0x186/0x4f0
[ 308.179693] [<ffffffff81183ef8>] ? __might_fault+0x48/0xa0
[ 308.179700] [<ffffffff814f3eed>] drm_ioctl+0x13d/0x590
[ 308.179707] [<ffffffff81501ca0>] ? drm_mode_setplane+0x1b0/0x1b0
[ 308.179714] [<ffffffff811d4c4c>] do_vfs_ioctl+0x2fc/0x550
[ 308.179722] [<ffffffff8179a8a6>] ? int_ret_from_sys_call+0x52/0x9f
[ 308.179730] [<ffffffff811e06ba>] ? __fget_light+0x6a/0x90
[ 308.179735] [<ffffffff811d4edc>] SyS_ioctl+0x3c/0x70
[ 308.179741] [<ffffffff8179a71b>] entry_SYSCALL_64_fastpath+0x16/0x73
[ 308.179747] ---[ end trace d0b8db053feb462f ]---</pre>
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