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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915] kernel warning hsw_unclaimed_reg_debug intel_uncore.c:619"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91960">91960</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[i915] kernel warning hsw_unclaimed_reg_debug intel_uncore.c:619
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>
<tr>
<th>Component</th>
<td>General
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alexandru.damian@intel.com
</td>
</tr></table>
<p>
<div>
<pre>Ubuntu mainline kernel
<a href="http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/current/linux-image-4.2.0-994-generic_4.2.0-994.201509092200_amd64.deb">http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/current/linux-image-4.2.0-994-generic_4.2.0-994.201509092200_amd64.deb</a>
Hardware Macbook Pro 12,1
backtrace
[ 3079.596981] WARNING: CPU: 2 PID: 0 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_uncore.c:619
hsw_unclaimed_reg_debug.isra.14+0x78/0xa0 [i915]()
[ 3079.596982] Unclaimed register detected before writing to register 0x223a0
[ 3079.596983] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE)
vboxnetflt(OE) vboxdrv(OE) nls_iso8859_1 snd_hda_codec_hdmi joydev applesmc
input_polldev btusb btrtl intel_rapl iosf_mbi x86_pkg_temp_thermal btbcm
intel_powerclamp btintel bcm5974 coretemp bluetooth snd_hda_codec_cirrus
input_leds hid_microsoft snd_hda_codec_generic kvm_intel kvm snd_hda_intel
snd_hda_codec snd_hda_core crct10dif_pclmul snd_hwdep crc32_pclmul snd_pcm
ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper
snd_seq_midi ablk_helper snd_seq_midi_event cryptd i915 snd_rawmidi brcmfmac
snd_seq brcmutil cfg80211 lpc_ich bdc_pci drm_kms_helper snd_seq_device
snd_timer drm shpchp i2c_algo_bit fb_sys_fops snd syscopyarea mei_me
sysfillrect sysimgblt mei soundcore sbs spi_pxa2xx_platform acpi_als sbshc
kfifo_buf
[ 3079.597024] industrialio mac_hid video apple_bl parport_pc ppdev lp parport
nfsd auth_rpcgss nfs_acl lockd grace sunrpc autofs4 hid_apple hid_generic
usbhid hid uas ahci usb_storage libahci
[ 3079.597034] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G OE
4.2.0-994-generic #201509092200
[ 3079.597036] Hardware name: Apple Inc. MacBookPro12,1/Mac-E43C1C25D4880AD6,
BIOS MBP121.88Z.0167.B07.1506051617 06/05/2015
[ 3079.597037] ffffffffc05056d0 ffff88026ec83c98 ffffffff817a1c43
0000000000000000
[ 3079.597038] ffff88026ec83ce8 ffff88026ec83cd8 ffffffff8107719a
ffff88026ec83cd8
[ 3079.597040] ffff880263740078 00000000000223a0 00000000000223a0
ffff880263740078
[ 3079.597041] Call Trace:
[ 3079.597042] <IRQ> [<ffffffff817a1c43>] dump_stack+0x45/0x57
[ 3079.597048] [<ffffffff8107719a>] warn_slowpath_common+0x8a/0xc0
[ 3079.597050] [<ffffffff81077216>] warn_slowpath_fmt+0x46/0x50
[ 3079.597061] [<ffffffffc04813c8>] hsw_unclaimed_reg_debug.isra.14+0x78/0xa0
[i915]
[ 3079.597064] [<ffffffff817a8ce7>] ? _raw_spin_lock_irqsave+0x37/0x40
[ 3079.597073] [<ffffffffc0485d8f>] gen8_write32+0x5f/0x1b0 [i915]
[ 3079.597083] [<ffffffffc04773e9>] intel_lrc_irq_handler+0x1a9/0x230 [i915]
[ 3079.597089] [<ffffffffc0434e54>] gen8_gt_irq_handler+0x224/0x250 [i915]
[ 3079.597094] [<ffffffffc0434efb>] gen8_irq_handler+0x7b/0x680 [i915]
[ 3079.597096] [<ffffffff810e09e4>] ? enqueue_hrtimer+0x44/0x80
[ 3079.597098] [<ffffffff810cdb79>] handle_irq_event_percpu+0x39/0x180
[ 3079.597100] [<ffffffff810cdd09>] handle_irq_event+0x49/0x70
[ 3079.597101] [<ffffffff810d0e4d>] handle_edge_irq+0x9d/0x150
[ 3079.597103] [<ffffffff810171c5>] handle_irq+0x25/0x40
[ 3079.597105] [<ffffffff817abb31>] do_IRQ+0x51/0xe0
[ 3079.597107] [<ffffffff817a9aab>] common_interrupt+0x6b/0x6b
[ 3079.597107] <EOI> [<ffffffff810e09e4>] ? enqueue_hrtimer+0x44/0x80
[ 3079.597111] [<ffffffff81643e68>] ? cpuidle_enter_state+0xb8/0x220
[ 3079.597112] [<ffffffff81643e44>] ? cpuidle_enter_state+0x94/0x220
[ 3079.597114] [<ffffffff81644007>] cpuidle_enter+0x17/0x20
[ 3079.597115] [<ffffffff810b72e2>] call_cpuidle+0x32/0x60
[ 3079.597117] [<ffffffff81643fe3>] ? cpuidle_select+0x13/0x20
[ 3079.597118] [<ffffffff810b756c>] cpu_startup_entry+0x25c/0x320
[ 3079.597120] [<ffffffff8104aed5>] start_secondary+0x175/0x1a0
[ 3079.597121] ---[ end trace 49f1deecd67e26fd ]---</pre>
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