[Bug 98930] New: WARN_ON backtraces on every boot on Acer Aspire One ZG5 32-bit

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98930

            Bug ID: 98930
           Summary: WARN_ON backtraces on every boot on Acer Aspire One
                    ZG5 32-bit
           Product: DRI
           Version: DRI git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: a_villacis at palosanto.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 128307
  --> https://bugs.freedesktop.org/attachment.cgi?id=128307&action=edit
Full dmesg of kernel with backtraces

Kernel: kernel-PAE-core-4.8.10-300.fc25.i686
Machine: Acer Aspire One ZG5
Video outputs: one LCD display 1024x600, one VGA port with no monitor attached.

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express
Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
        Subsystem: Acer Incorporated [ALI] Device 015b
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at 58480000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at 60c0 [size=8]
        Memory at 40000000 (32-bit, prefetchable) [size=256M]
        Memory at 58500000 (32-bit, non-prefetchable) [size=256K]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

Every single time the kernel boots, I get three WARN_ON messages in the dmesg
log:

[    4.757645] ------------[ cut here ]------------
[    4.757817] WARNING: CPU: 0 PID: 89 at
drivers/gpu/drm/i915/intel_fbdev.c:416 intel_fb_initial_config+0x366/0x680
[i915]
[    4.757821] WARN_ON(!connector->state->crtc)
[    4.757824] Modules linked in:
[    4.757827]  i915 ata_generic serio_raw i2c_algo_bit drm_kms_helper
pata_acpi drm r8169 mii fjes video
[    4.757856] CPU: 0 PID: 89 Comm: kworker/u4:2 Not tainted
4.8.10-300.fc25.i686+PAE #1
[    4.757859] Hardware name: Acer AOA150/        , BIOS v0.3301 05/09/2008
[    4.757869] Workqueue: events_unbound async_run_entry_fn
[    4.757875]  ce63a967 5cca08e8 00000286 f49b5d18 cdf5ccd0 f49b5d5c f864b748
f49b5d48
[    4.757891]  cdc6c0aa f8657bef f49b5d7c 00000059 f864b748 000001a0 f85f61d6
000001a0
[    4.757905]  00000001 00000000 f4b3c800 f49b5d68 cdc6c116 00000009 00000000
f49b5d5c
[    4.757920] Call Trace:
[    4.757933]  [<cdf5ccd0>] dump_stack+0x58/0x78
[    4.757941]  [<cdc6c0aa>] __warn+0xea/0x110
[    4.758018]  [<f85f61d6>] ? intel_fb_initial_config+0x366/0x680 [i915]
[    4.758018]  [<cdc6c116>] warn_slowpath_fmt+0x46/0x60
[    4.758018]  [<f85f61d6>] intel_fb_initial_config+0x366/0x680 [i915]
[    4.758018]  [<f85f5e70>] ? intelfb_create+0x540/0x540 [i915]
[    4.758018]  [<f80c54d3>] drm_setup_crtcs+0x1c3/0xa40 [drm_kms_helper]
[    4.758018]  [<cdc9302f>] ? ttwu_do_activate+0x5f/0x70
[    4.758018]  [<cdc939e4>] ? try_to_wake_up+0x44/0x340

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