Unity freezes when trying to connect to a network.

[Csonka Bálint]

Unity3d was crashing all the time I logged in. And freezing the whole desktop. I thought it was because my netbook specs (intel atom, i915 gpu).
Until i found out if i turn off my wireless card disabling automatic connection to internet, Unity starts fine and is pretty snappy and usable. If i turn wireless back with Fn+F1 as soon as the connection sequence starts unity freezes again.

[Csonka Bálint (balint777)]

After reinstall Unity does not freeze immediately. It is usable for a while, then randomly the network drops, and the freeze occours.
Dmesg outputs a couple of drm errors.

[drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 9004, at 9004], missed IRQ?

[Csonka Bálint (balint777)]

It seems to be a kernel issue caused by a kernel bug (EHCI: BIOS handoff
failed (BIOS bug?)) read on
here<https://lists.linux-foundation.org/pipermail/bugme-new/2008-December/020541.html>
.
Disabling the Legacy USB support in BIOS seems to resolve the problem.

[Sebastien Bacher (seb128)]

closing the bug since that's not an Unity issue

[Csonka Bálint (balint777)]

Anyway every other destops (Unity2D, KDE, Gnome3) works fine. It makes only
Unity 3D crash. So I would not say it is invalid.

Sebastien Bacher 2011. november 14., hétfő napon a következőt írta:

> closing the bug since that's not an Unity issue
>
> ** Changed in: unity (Ubuntu)
> Importance: Undecided => Low
>
> ** Changed in: unity (Ubuntu)
> Status: New => Invalid
>
> ** Changed in: unity
> Importance: Undecided => Low
>
> ** Changed in: unity
> Status: New => Invalid
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/879343
>
> Title:
> Unity freezes when trying to connect to a network.
>
> Status in Unity:
> Invalid
> Status in “unity” package in Ubuntu:
> Invalid
>
> Bug description:
> Unity3d was crashing all the time I logged in. And freezing the whole
> desktop. I thought it was because my netbook specs (intel atom, i915 gpu).
> Until i found out if i turn off my wireless card disabling automatic
> connection to internet, Unity starts fine and is pretty snappy and usable.
> If i turn wireless back with Fn+F1 as soon as the connection sequence
> starts unity freezes again.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/unity/+bug/879343/+subscriptions
>

--
*Csonka Bálint* @913

[Csonka Bálint (balint777)]

After a few days of further testing the problem appears again, only not
when tryig to connect, but seemingly randomly.

here's my dmesg output. The crash seemingly happens at 'Disabling IRQ #16':

[ 801.506696] Call Trace:
[ 801.506712] [<c1518c98>] ? printk+0x2d/0x2f
[ 801.506725] [<c10aab99>] __report_bad_irq+0x29/0xd0
[ 801.506733] [<c10aaf64>] note_interrupt+0x104/0x150
[ 801.506743] [<c10a948e>] handle_irq_event_percpu+0x9e/0x200
[ 801.506753] [<c1026018>] ? default_spin_lock_flags+0x8/0x10
[ 801.506762] [<c152c6fd>] ? _raw_spin_lock_irqsave+0x2d/0x40
[ 801.506770] [<c1026018>] ? default_spin_lock_flags+0x8/0x10
[ 801.506780] [<c101d43d>] ? __io_apic_modify_irq+0x7d/0x90
[ 801.506788] [<c10a962b>] handle_irq_event+0x3b/0x60
[ 801.506796] [<c10ab6a0>] ? unmask_irq+0x30/0x30
[ 801.506803] [<c10ab6ee>] handle_fasteoi_irq+0x4e/0xc0
[ 801.506808] <IRQ> [<c1533c32>] ? do_IRQ+0x42/0xc0
[ 801.506822] [<c104cf22>] ? sys_gettimeofday+0x32/0x70
[ 801.506830] [<c1533b70>] ? common_interrupt+0x30/0x38
[ 801.506839] [<c1520000>] ? reserve_backup_gdb.isra.11+0x26d/0x2c0
[ 801.506844] handlers:
[ 801.506885] [<f835d130>] i915_driver_irq_handler
[ 801.506891] Disabling IRQ #16
[ 803.004080] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 55440, at 55441], missed IRQ?
[ 844.685483] chromium-browse[1520]: segfault at 0 ip b42e1550 sp bfedb090
error 4 in chromium-browser[b3f46000+38fa000]
[ 900.000032] [Hardware Error]: Machine check events logged
[ 968.068166] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57628, at 57630], missed IRQ?
[ 970.788102] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57659, at 57661], missed IRQ?
[ 973.636113] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57697, at 57699], missed IRQ?
[ 976.180065] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57728, at 57730], missed IRQ?
[ 979.076108] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57771, at 57773], missed IRQ?
[ 980.932129] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57783, at 57785], missed IRQ?
[ 983.872135] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57823, at 57825], missed IRQ?
[ 987.612104] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57874, at 57876], missed IRQ?
[ 989.224118] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 57880, at 57882], missed IRQ?
[ 1014.680163] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 58077, at 58079], missed IRQ?
[ 1016.700168] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 58099, at 58101], missed IRQ?
[ 1018.520060] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer
elapsed... render ring idle [waiting on 58115, ...