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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 --- - [byt] drm:vlv_force_gfx_clock *ERROR* timeout waiting for GFX clock force-off (00000008)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81101">81101</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>[byt] drm:vlv_force_gfx_clock *ERROR* timeout waiting for GFX clock force-off (00000008)
</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>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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=102483" name="attach_102483" title="dmesg">attachment 102483</a> <a href="attachment.cgi?id=102483&action=edit" title="dmesg">[details]</a></span>
dmesg
[ 449.303068] ------------[ cut here ]------------
[ 449.303082] WARNING: CPU: 2 PID: 1380 at
drivers/gpu/drm/i915/i915_drv.c:1189 vlv_force_gfx_clock+0x244/0x250()
[ 449.303085] Modules linked in: ctr(E) ccm(E) arc4(E) iTCO_wdt(E)
asus_nb_wmi(E) hid_multitouch(E) iTCO_vendor_support(E) asus_wmi(E)
sparse_keymap(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E)
crc32_pclmul(E) ghash_clmulni_intel(E) aesni_intel(E) aes_x86_64(E) lrw(E)
gf128mul(E) glue_helper(E) ablk_helper(E) cryptd(E) rt2800usb(E) rt2x00usb(E)
rt2800lib(E) rt2x00lib(E) microcode(E) mac80211(E) crc_ccitt(E) joydev(E)
brcmfmac(E) brcmutil(E) cfg80211(E) pcspkr(E) wmi(E) ak8975(E) mac_hid(E)
industrialio(E) dw_dmac(E) dw_dmac_core(E) acpi_pad(E) iosf_mbi(E) lpc_ich(E)
spi_pxa2xx_platform(E) i2c_designware_platform(E) 8250_dw(E)
i2c_designware_core(E) autofs4(E) ext2(E) usbkbd(E) hid_generic(E)
usb_storage(E) usbhid(E) mmc_block(E) i2c_hid(E) hid(E) sdhci_acpi(E) sdhci(E)
[ 449.303156] CPU: 2 PID: 1380 Comm: kworker/u8:1 Tainted: G W E
3.16.0-rc4+ #297
[ 449.303159] Hardware name: ASUSTeK COMPUTER INC. T100TA/T100TA, BIOS
T100TA.304 03/14/2014
[ 449.303166] Workqueue: i915 i915_gem_idle_work_handler
[ 449.303169] 0000000000000009 ffff88007201fd20 ffffffff817e8f2b
0000000000000000
[ 449.303174] ffff88007201fd58 ffffffff81067ffd ffff880036c20000
0000000000000000
[ 449.303179] 0000000100009172 ffff880036c20000 0000000000000100
ffff88007201fd68
[ 449.303184] Call Trace:
[ 449.303194] [<ffffffff817e8f2b>] dump_stack+0x45/0x56
[ 449.303201] [<ffffffff81067ffd>] warn_slowpath_common+0x7d/0xa0
[ 449.303206] [<ffffffff810680da>] warn_slowpath_null+0x1a/0x20
[ 449.303211] [<ffffffff814be774>] vlv_force_gfx_clock+0x244/0x250
[ 449.303217] [<ffffffff814c9120>] gen6_rps_idle+0x170/0x1f0
[ 449.303223] [<ffffffff81516b65>] intel_mark_idle+0x1a5/0x200
[ 449.303229] [<ffffffff810978c8>] ? finish_task_switch+0x128/0x180
[ 449.303234] [<ffffffff814df625>] i915_gem_idle_work_handler+0x15/0x20
[ 449.303240] [<ffffffff81083a62>] process_one_work+0x182/0x450
[ 449.303245] [<ffffffff810841d3>] worker_thread+0x123/0x5a0
[ 449.303251] [<ffffffff810840b0>] ? rescuer_thread+0x380/0x380
[ 449.303256] [<ffffffff8108add9>] kthread+0xc9/0xe0
[ 449.303261] [<ffffffff8108ad10>] ? kthread_create_on_node+0x180/0x180
[ 449.303267] [<ffffffff817f267c>] ret_from_fork+0x7c/0xb0
[ 449.303272] [<ffffffff8108ad10>] ? kthread_create_on_node+0x180/0x180
[ 449.303275] ---[ end trace f24328456c1916e6 ]---
repeats.</pre>
</div>
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