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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BDW] WARN_ON(intel_state->cdclk == 0)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98902">98902</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW] WARN_ON(intel_state->cdclk == 0)
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (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>
<tr>
<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>matthew.auld@intel.com
</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>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=128265" name="attach_128265" title="dmesg">attachment 128265</a> <a href="attachment.cgi?id=128265&action=edit" title="dmesg">[details]</a></span>
dmesg
No visible issues, but on the latest -nightly I keep hitting the following:
[ 6.136214] WARNING: CPU: 0 PID: 396 at drivers/gpu/drm/i915/intel_pm.c:2089
ilk_compute_pipe_wm+0x4b0/0x4c0 [i915]
[ 6.136215] WARN_ON(intel_state->cdclk == 0)
[ 6.136216] Modules linked in:
[ 6.136217] i915(+) rtsx_pci_sdmmc mmc_core intel_gtt i2c_algo_bit
drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel drm serio_raw
ghash_clmulni_intel e1000e rtsx_pci ptp pps_core fjes video
[ 6.136229] CPU: 0 PID: 396 Comm: systemd-udevd Not tainted
4.9.0-rc7-drm-intel+ #183
[ 6.136230] Hardware name: LENOVO 20BW000FUK/20BW000FUK, BIOS JBET54WW (1.19
) 11/06/2015
[ 6.136231] ffffb686014c36d8 ffffffff85527243 ffffb686014c3728
0000000000000000
[ 6.136234] ffffb686014c3718 ffffffff850ae7eb 00000829e912cd00
0000000000000000
[ 6.136237] ffff95dfe6498000 ffff95dfe86b1000 0000000000000004
ffff95dfe3477800
[ 6.136240] Call Trace:
[ 6.136244] [<ffffffff85527243>] dump_stack+0x86/0xc3
[ 6.136245] [<ffffffff850ae7eb>] __warn+0xcb/0xf0
[ 6.136247] [<ffffffff850ae86f>] warn_slowpath_fmt+0x5f/0x80
[ 6.136270] [<ffffffffc028a8e0>] ilk_compute_pipe_wm+0x4b0/0x4c0 [i915]
[ 6.136278] [<ffffffffc01c1f9b>] ? __drm_mode_object_find+0x6b/0xd0 [drm]
[ 6.136306] [<ffffffffc02fac54>] intel_crtc_atomic_check+0x64/0x250 [i915]
[ 6.136311] [<ffffffffc0235d3f>] drm_atomic_helper_check_planes+0x13f/0x1e0
[drm_kms_helper]
[ 6.136339] [<ffffffffc02fde88>] intel_atomic_check+0xa28/0x11e0 [i915]
[ 6.136366] [<ffffffffc02fe6da>] sanitize_watermarks+0x9a/0x1c0 [i915]
[ 6.136394] [<ffffffffc03065ba>] intel_modeset_init+0xf8a/0x1660 [i915]
[ 6.136417] [<ffffffffc02755b2>] i915_driver_load+0xa12/0x14b0 [i915]
[ 6.136440] [<ffffffffc02801cd>] i915_pci_probe+0x2d/0x50 [i915]
[ 6.136443] [<ffffffff85581825>] local_pci_probe+0x45/0xa0
[ 6.136445] [<ffffffff8558288a>] ? pci_match_device+0xca/0x110
[ 6.136448] [<ffffffff85582ca3>] pci_device_probe+0x103/0x150
[ 6.136450] [<ffffffff8567f853>] driver_probe_device+0x223/0x430
[ 6.136452] [<ffffffff8567fb43>] __driver_attach+0xe3/0xf0
[ 6.136453] [<ffffffff8567fa60>] ? driver_probe_device+0x430/0x430
[ 6.136455] [<ffffffff8567d173>] bus_for_each_dev+0x73/0xc0
[ 6.136456] [<ffffffff8567ef8e>] driver_attach+0x1e/0x20
[ 6.136457] [<ffffffff8567e9c3>] bus_add_driver+0x173/0x270
[ 6.136459] [<ffffffffc03f0000>] ? 0xffffffffc03f0000
[ 6.136460] [<ffffffff85680790>] driver_register+0x60/0xe0
[ 6.136462] [<ffffffffc03f0000>] ? 0xffffffffc03f0000
[ 6.136464] [<ffffffff85581140>] __pci_register_driver+0x60/0x70
[ 6.136488] [<ffffffffc03f0057>] i915_init+0x57/0x5a [i915]
[ 6.136491] [<ffffffff85002190>] do_one_initcall+0x50/0x180
[ 6.136493] [<ffffffff8512c365>] ? rcu_read_lock_sched_held+0x45/0x80
[ 6.136494] [<ffffffff8526b9d0>] ? kmem_cache_alloc_trace+0x220/0x280
[ 6.136496] [<ffffffff851f2ed3>] ? do_init_module+0x27/0x1f1
[ 6.136497] [<ffffffff851f2f0b>] do_init_module+0x5f/0x1f1
[ 6.136499] [<ffffffff85158244>] load_module+0x2604/0x2a80
[ 6.136501] [<ffffffff851548d0>] ? __symbol_put+0x70/0x70
[ 6.136503] [<ffffffff8529a3db>] ? vfs_read+0x11b/0x130
[ 6.136505] [<ffffffff8515893f>] SYSC_finit_module+0xdf/0x110
[ 6.136507] [<ffffffff8515898e>] SyS_finit_module+0xe/0x10
[ 6.136508] [<ffffffff85003eec>] do_syscall_64+0x6c/0x1f0
[ 6.136511] [<ffffffff8599fa09>] entry_SYSCALL64_slow_path+0x25/0x25</pre>
</div>
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