Re: [Intel-gfx] [REGRESSION v4.7] i915 / drm crash when undocking from DP monitors

[Vadim Lobanov]

Certainly, done and done. The bug is filed at:
https://bugs.freedesktop.org/show_bug.cgi?id=98211

Thanks!

On Tue, Oct 11, 2016 at 6:55 AM, Jani Nikula
 wrote:
> On Sat, 08 Oct 2016, Vadim Lobanov  wrote:
>> I'm seeing a repeatable crash on my HP EliteBook 840 G2/2216 when
>> booting it while in a docking station connected to two external
>> DisplayPort monitors, undocking, and then either logging out or
>> shutting down -- regardless of whether I've redocked it beforehand or
>> not. Both logout and shutdown work great if I do not undock the laptop
>> at all, so the badness correlates with the DP monitors going away.
>
> Please file a bug at [1] with the info in this mail, add drm.debug=14
> module parameter, and attach dmesg from boot to the problem into the
> bug.
>
> BR,
> Jani.
>
> [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI=DRM/Intel
>
> --
> Jani Nikula, Intel Open Source Technology Center
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Re: [Intel-gfx] [REGRESSION v4.7] i915 / drm crash when undocking from DP monitors

[Jani Nikula]

On Sat, 08 Oct 2016, Vadim Lobanov  wrote:
> I'm seeing a repeatable crash on my HP EliteBook 840 G2/2216 when
> booting it while in a docking station connected to two external
> DisplayPort monitors, undocking, and then either logging out or
> shutting down -- regardless of whether I've redocked it beforehand or
> not. Both logout and shutdown work great if I do not undock the laptop
> at all, so the badness correlates with the DP monitors going away.

Please file a bug at [1] with the info in this mail, add drm.debug=14
module parameter, and attach dmesg from boot to the problem into the
bug.

BR,
Jani.

[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI=DRM/Intel

-- 
Jani Nikula, Intel Open Source Technology Center
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[Intel-gfx] [REGRESSION v4.7] i915 / drm crash when undocking from DP monitors

[Vadim Lobanov]

Hi folks,

I'm seeing a repeatable crash on my HP EliteBook 840 G2/2216 when
booting it while in a docking station connected to two external
DisplayPort monitors, undocking, and then either logging out or
shutting down -- regardless of whether I've redocked it beforehand or
not. Both logout and shutdown work great if I do not undock the laptop
at all, so the badness correlates with the DP monitors going away.

This is a regression introduced somewhere in the v4.6 -> v4.7
development timeframe: 4.6.0 works, 4.7.0 fails as described, and
4.8.0 crashes earlier still when undocking.

The graphics hardware involved is:

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500
(rev 09) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company ZBook 15u G2 Mobile Workstation
Flags: bus master, fast devsel, latency 0, IRQ 49
Memory at c000 (64-bit, non-prefetchable) [size=16M]
Memory at b000 (64-bit, prefetchable) [size=256M]
I/O ports at 5000 [size=64]
[virtual] Expansion ROM at 000c [disabled] [size=128K]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2
Capabilities: [a4] PCI Advanced Features
Kernel driver in use: i915
Kernel modules: i915

And the crash that I see is similar to this:

Oct 07 17:47:16 localhost.localdomain kernel: BUG: unable to handle
kernel paging request at 00018c70
Oct 07 17:47:16 localhost.localdomain kernel: IP: []
queued_spin_lock_slowpath+0x108/0x190
Oct 07 17:47:16 localhost.localdomain kernel: PGD 0
Oct 07 17:47:16 localhost.localdomain kernel: Oops: 0002 [#1] SMP
Oct 07 17:47:16 localhost.localdomain kernel: Modules linked in:
rfcomm ccm xt_CHECKSUM tun ipt_MASQUERADE nf_nat_masquerade_ipv4
xt_addrtype nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_REJECT
nf_reject_
Oct 07 17:47:16 localhost.localdomain kernel:  sparse_keymap ppdev
irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel iwlwifi
intel_cstate intel_uncore intel_rapl_perf cfg80211 joydev uvcvideo
lpc_ich r
Oct 07 17:47:16 localhost.localdomain kernel: CPU: 2 PID: 855 Comm:
systemd-logind Not tainted 4.7.5-200.fc24.x86_64 #1
Oct 07 17:47:16 localhost.localdomain kernel: Hardware name:
Hewlett-Packard HP EliteBook 840 G2/2216, BIOS M71 Ver. 01.04
02/24/2015
Oct 07 17:47:16 localhost.localdomain kernel: task: 88043a12
ti: 880035d5 task.ti: 880035d5
Oct 07 17:47:16 localhost.localdomain kernel: RIP:
0010:[]  []
queued_spin_lock_slowpath+0x108/0x190
Oct 07 17:47:16 localhost.localdomain kernel: RSP:
0018:880035d53908  EFLAGS: 00010202
Oct 07 17:47:16 localhost.localdomain kernel: RAX: 00018c70
RBX: 880438716a50 RCX: 88044f498c40
Oct 07 17:47:16 localhost.localdomain kernel: RDX: 1b9a
RSI: 6e6f746f RDI: 880438716a54
Oct 07 17:47:16 localhost.localdomain kernel: RBP: 880035d53908
R08: 000c R09: 
Oct 07 17:47:16 localhost.localdomain kernel: R10: 880096e4e780
R11: 0898 R12: 88043ab3ec40
Oct 07 17:47:16 localhost.localdomain kernel: R13: 880438716a58
R14: 880427ebd800 R15: 8804396bd000
Oct 07 17:47:16 localhost.localdomain kernel: FS:
7f22e2cb5900() GS:88044f48()
knlGS:
Oct 07 17:47:16 localhost.localdomain kernel: CS:  0010 DS:  ES:
 CR0: 80050033
Oct 07 17:47:16 localhost.localdomain kernel: CR2: 00018c70
CR3: 00043a095000 CR4: 003406e0
Oct 07 17:47:16 localhost.localdomain kernel: DR0: 
DR1:  DR2: 
Oct 07 17:47:16 localhost.localdomain kernel: DR3: 
DR6: fffe0ff0 DR7: 0400
Oct 07 17:47:16 localhost.localdomain kernel: Stack:
Oct 07 17:47:16 localhost.localdomain kernel:  880035d53918
967ec350 880035d53940 967e9f2f
Oct 07 17:47:16 localhost.localdomain kernel:  88043ab3ec40
880438716a50 880438714800 880035d53970
Oct 07 17:47:16 localhost.localdomain kernel:  c00a155e
880427e49800 880438716800 880427ebd800
Oct 07 17:47:16 localhost.localdomain kernel: Call Trace:
Oct 07 17:47:16 localhost.localdomain kernel:  []
_raw_spin_lock+0x20/0x30
Oct 07 17:47:16 localhost.localdomain kernel:  []
__ww_mutex_lock+0x6f/0xa0
Oct 07 17:47:16 localhost.localdomain kernel:  []
drm_modeset_lock+0x4e/0xd0 [drm]
Oct 07 17:47:16 localhost.localdomain kernel:  []
drm_atomic_get_connector_state+0x34/0x1c0 [drm]
Oct 07 17:47:16 localhost.localdomain kernel:  []
__drm_atomic_helper_set_config+0x2a0/0x360 [drm_kms_helper]
Oct 07 17:47:16 localhost.localdomain kernel:  []
restore_fbdev_mode+0x22a/0x260 [drm_kms_helper]
Oct 07 17:47:16 localhost.localdomain kernel:  []
drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper]
Oct 07 17:47:16 localhost.localdomain kernel:  []
drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
Oct 07 17:47:16 localhost.localdomain kernel:  []