It seems that suspending (to ram) fixes the problem most of the time.
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https://bugs.launchpad.net/bugs/1297421
Title:
Sound stops working occasionally on Latitude E7440
To manage notif
I've been suffering with this problem too, though I've also been
suffering with it in 13.10.
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https://bugs.launchpad.net/bugs/1297421
Title:
Sound stops working occasionally on Latitude
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: pulseaudio (Ubuntu)
Status: New => Confirmed
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Title:
[ 5322.799894] WARNING: CPU: 1 PID: 7280 at
/build/buildd/linux-3.13.0/kernel/irq/manage.c:1256 __free_irq+0xa3/0x1e0()
[ 5322.799895] Trying to free already-free IRQ 20
[ 5322.799920] Modules linked in: ctr ccm bnep rfcomm bluetooth binfmt_misc
pn544_mei mei_phy pn544 hci nfc ppdev dell_wmi spar
** Package changed: ubuntu-release-upgrader (Ubuntu) => ubuntu
** Package changed: ubuntu => pulseaudio (Ubuntu)
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Title:
Sound stops working occ
** Attachment added: "alsa-info output after sound worked again without
restarting."
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1297421/+attachment/4043221/+files/alsa-info-working-again-after-unplugging.sh
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