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[Bug 1575467] Re: [Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-utopic-vy2yyy/linux-lts-utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:1743 vlv_wait_port_ready+0x126/0x170 [i915]()
@Stephen Gutknecht, it looks like that bug report could be the same.
I am not using the "intel_idle.max_cstate=1" workaround as that is only
a hack of a solution and not designed for long term use. Many with the
same architecture as me and with the same problems have reported that
fix seems to work well for them, but since it requires fiddling with
grub and prevents freezing at the expense of increased CPU heat i have
avoided it. I would rather try and spend the effort to try and help get
a real fix in the works, but i'll be honest in saying i'm not sure any
progress has been made and/or if i am really helping.
But your right, compared to most kernel problems this one does not even
give a kernel panic indicator or any watchdog, so that is unsettling.
The kernel i've been using when i absolutely can't afford a freeze is
still my trusty 3.16 kernel. A potential work around for the school guy
(Rüdiger Kupper) could be to upgrade his systems, but then downgrade the
kernel to 3.16 and remove any newer ones and disable updates. But that's
not a great solution either, but it should work.
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[Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts-
Status in linux package in Ubuntu:
Status in linux source package in Xenial:
After upgrading from stock Ubuntu 14.04 to 16.04 my laptop
consistently freezes up and is unresponsive to keyboard or mouse. The
only way is to do a hard shutdown. I'm usually in a browser when this
happens, and often watching a video or two. It seems to happen more
often in Google Chrome than Firefox, but it happens with both. It has
happened at least once with no videos loaded. I haven’t observed it
freeze / hang when I’m not in a browser, but that's mainly what i use
my laptop for, so that's where most of my time is spent.
USER PID ACCESS COMMAND
/dev/snd/controlC0: andrew 1949 F.... pulseaudio
DistroRelease: Ubuntu 16.04
InstallationDate: Installed on 2015-08-08 (263 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: Dell Inc. Inspiron 3451
Package: linux (not installed)
PATH=(custom, no user)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=d01f07be-c906-4024-8eef-a58ba3935298 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
Uname: Linux 4.4.0-21-generic x86_64
UpgradeStatus: Upgraded to xenial on 2016-04-22 (4 days ago)
dmi.bios.vendor: Dell Inc.
dmi.board.vendor: Dell Inc.
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.product.name: Inspiron 3451
dmi.sys.vendor: Dell Inc.
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