Public bug reported:
Using the new alx module in 3.5.0-24.37, some HP systems have the
problem that the transmit queue times out:
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846931] ------------[ cut here
]------------
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846940] WARNING: at
/build/buildd/linux-lts-quantal-3.5.0/net/sched/sch_generic.c:255
dev_watchdog+0x272/0x280()
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846942] Hardware name:
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846943] NETDEV WATCHDOG: eth0
(alx): transmit queue 2 timed out
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846945] Modules linked in:
nls_iso8859_1 rfcomm bnep parport_pc ppdev dm_multipath scsi_dh arc4 joydev
ath9k mac80211 snd_hda_codec_idt(O) snd_hda_intel(O) snd_hda_codec(O)
ath9k_common kvm_amd kvm ath9k_hw snd_hwdep snd_pcm btusb ath snd_seq_midi
snd_rawmidi alx snd_seq_midi_event ghash_clmulni_intel bluetooth snd_seq
cfg80211 snd_timer snd_seq_device snd aesni_intel cryptd mdio aes_x86_64
psmouse soundcore snd_page_alloc serio_raw microcode mac_hid i2c_piix4 k10temp
lp parport binfmt_misc dm_raid45 xor dm_mirror dm_region_hash dm_log btrfs
zlib_deflate libcrc32c vesafb usb_storage hid_generic usbhid hid wmi
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846979] Pid: 0, comm: swapper/3
Tainted: G O 3.5.0-24-generic #37~precise1-Ubuntu
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846981] Call Trace:
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846983] <IRQ>
[<ffffffff81052c6f>] warn_slowpath_common+0x7f/0xc0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846989] [<ffffffff81052d66>]
warn_slowpath_fmt+0x46/0x50
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846992] [<ffffffff815a0eb2>]
dev_watchdog+0x272/0x280
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846996] [<ffffffff8101be03>] ?
native_sched_clock+0x13/0x80
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.846998] [<ffffffff815a0c40>] ?
pfifo_fast_dequeue+0xe0/0xe0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847000] [<ffffffff815a0c40>] ?
pfifo_fast_dequeue+0xe0/0xe0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847003] [<ffffffff81062c86>]
call_timer_fn+0x46/0x160
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847005] [<ffffffff815a0c40>] ?
pfifo_fast_dequeue+0xe0/0xe0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847007] [<ffffffff810645d2>]
run_timer_softirq+0x132/0x2a0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847010] [<ffffffff810a40a5>] ?
ktime_get+0x65/0xe0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847013] [<ffffffff8105ba28>]
__do_softirq+0xa8/0x210
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847015] [<ffffffff810ab204>] ?
tick_program_event+0x24/0x30
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847018] [<ffffffff816a8e1c>]
call_softirq+0x1c/0x30
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847021] [<ffffffff81016245>]
do_softirq+0x65/0xa0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847023] [<ffffffff8105be0e>]
irq_exit+0x8e/0xb0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847025] [<ffffffff816a975e>]
smp_apic_timer_interrupt+0x6e/0x99
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847028] [<ffffffff816a84ca>]
apic_timer_interrupt+0x6a/0x70
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847029] <EOI>
[<ffffffff8103ff56>] ? native_safe_halt+0x6/0x10
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847034] [<ffffffff8101c993>]
default_idle+0x53/0x1f0
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847036] [<ffffffff8101d8a9>]
cpu_idle+0xd9/0x120
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847039] [<ffffffff8167bc07>]
start_secondary+0xc3/0xc5
Feb 19 06:54:40 ubuntu-desktop kernel: [ 20.847041] ---[ end trace
24ab339038e093ee ]---
I'll include the full kernel log as an attachment
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: blocks-hwcert-enablement quantal
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https://bugs.launchpad.net/bugs/1130503
Title:
Some HP machines do not work with the alx driver
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