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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 - Dell XPS 13 and TB16: null pointer upon resume from hibernation/sleep"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105367">105367</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Dell XPS 13 and TB16: null pointer upon resume from hibernation/sleep
</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>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>aappddeevv@gmail.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>I'm running fedora 4.17.7. If I sleep or hibernate while attached to the dock,
upon resume I get a null pointer dereference. The computer is still running but
graphics are lost and I must reboot. Oddly, running systemctl reboot does not
work and I must physically power cycle.
---[ end trace b65a0397584a1c12 ]---
Mar 06 06:37:48 nc6910p kernel: CR2: 0000000000000000
Mar 06 06:37:48 nc6910p kernel: RIP: drm_dp_get_mst_branch_device+0xc6/0xf0
[drm_kms_helper] RSP: ffffa9358917bd28
Mar 06 06:37:48 nc6910p kernel: Code: 02 eb a4 48 8b 6f 20 48 85 ed 75 e0 45 0f
b6 04 24 44 89 e9 48 c7 c2 28 c0 52 c0 31 f6 48 c7 c7 32 d3 52 c0 e8 0c 64 f7
ff eb 0a <f0> ff 45 00 0f 88 99 d4 00 00 48 89 df e8 38 26 38 ea 48 89
Mar 06 06:37:48 nc6910p kernel: ret_from_fork+0x35/0x40
Mar 06 06:37:48 nc6910p kernel: ? kthread_create_worker_on_cpu+0x70/0x70
Mar 06 06:37:48 nc6910p kernel: kthread+0x113/0x130
Mar 06 06:37:48 nc6910p kernel: ? process_one_work+0x390/0x390
Mar 06 06:37:48 nc6910p kernel: worker_thread+0x2e/0x380
Mar 06 06:37:48 nc6910p kernel: process_one_work+0x175/0x390
Mar 06 06:37:48 nc6910p kernel: i915_digport_work_func+0x8d/0x110 [i915]
Mar 06 06:37:48 nc6910p kernel: ? __clear_rsb+0x15/0x3d
Mar 06 06:37:48 nc6910p kernel: intel_dp_hpd_pulse+0x19c/0x310 [i915]
Mar 06 06:37:48 nc6910p kernel: intel_dp_check_mst_status+0xc1/0x200 [i915]
Mar 06 06:37:48 nc6910p kernel: ? intel_dp_check_mst_status+0xc1/0x200 [i915]
Mar 06 06:37:48 nc6910p kernel: drm_dp_mst_hpd_irq+0x10b/0x8d0
[drm_kms_helper]
Mar 06 06:37:48 nc6910p kernel: Call Trace:
Mar 06 06:37:48 nc6910p kernel: CR2: 0000000000000000 CR3: 00000001f420a002
CR4: 00000000003606f0
Mar 06 06:37:48 nc6910p kernel: CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Mar 06 06:37:48 nc6910p kernel: FS: 0000000000000000(0000)
GS:ffff8cdd3ec00000(0000) knlGS:0000000000000000
Mar 06 06:37:48 nc6910p kernel: R13: 0000000000000001 R14: ffff8cdd27a39748
R15: ffff8cdd27a39710
Mar 06 06:37:48 nc6910p kernel: R10: ffffa9358917bd28 R11: 0000000000000035
R12: ffff8cdd27a39880
Mar 06 06:37:48 nc6910p kernel: RBP: 0000000000000000 R08: ffff8cdd3ec214a0
R09: 0000000000000000
Mar 06 06:37:48 nc6910p kernel: RDX: 0000000000000000 RSI: ffff8cdbfa4e9fc0
RDI: ffff8cdd27a399e0
Mar 06 06:37:48 nc6910p kernel: RAX: 0000000000000000 RBX: ffff8cdd27a399d8
RCX: ffff8cdbfa4e9fc1
Mar 06 06:37:48 nc6910p kernel: RSP: 0018:ffffa9358917bd28 EFLAGS: 00010246
Mar 06 06:37:48 nc6910p kernel: RIP:
0010:drm_dp_get_mst_branch_device+0xc6/0xf0 [drm_kms_helper]
Mar 06 06:37:48 nc6910p kernel: Workqueue: i915-dp i915_digport_work_func
[i915]
Mar 06 06:37:48 nc6910p kernel: Hardware name: Dell Inc. XPS 13 9350/0H67KH,
BIOS 1.6.1 12/14/2017
Mar 06 06:37:48 nc6910p kernel: CPU: 0 PID: 26397 Comm: kworker/u8:122 Tainted:
G W 4.15.7-300.fc27.x86_64 #1
Mar 06 06:37:48 nc6910p kernel: int3400_thermal pinctrl_sunrisepoint
int340x_thermal_zone acpi_pad acpi_thermal_rel pinctrl_intel nfsd auth_rpcgss
binfmt_misc nfs_acl lockd grace sunrpc i915 rtsx_pci_sdmmc mmc_core
i2c_algo_bit
Mar 06 06:37:48 nc6910p kernel: snd_soc_sst_dsp snd_hda_codec_hdmi
snd_soc_sst_ipc snd_soc_acpi iTCO_wdt iTCO_vendor_support snd_soc_core
intel_rapl dell_wmi wmi_bmof x86_pkg_temp_thermal intel_powerclamp coretemp
snd_hda_codec
Mar 06 06:37:48 nc6910p kernel: Modules linked in: uinput cmac rfcomm bnep
btusb btrtl btbcm btintel bluetooth ecdh_generic fuse hid_plantronics
snd_usb_audio snd_usbmidi_lib snd_rawmidi cdc_ether usbnet r8152 mii
thunderbolt nv
Mar 06 06:37:48 nc6910p kernel: Oops: 0002 [#1] SMP PTI
Mar 06 06:37:48 nc6910p kernel: PGD 0 P4D 0
Mar 06 06:37:48 nc6910p kernel: IP: drm_dp_get_mst_branch_device+0xc6/0xf0
[drm_kms_helper]
Mar 06 06:37:48 nc6910p kernel: BUG: unable to handle kernel NULL pointer
dereference at (null)</pre>
</div>
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