Public bug reported:
With Dell E7440 with Intel graphics, attached to dock and also two
external displays connected to the dock:
when I boot the machine, the built-in display and the external displays
are enabled in login screen. However, the external displays are disabled
when I log in.
All
I have linux-image-extra-${ver}-generic for each normal Ubuntu linux-
image-${ver}-generic package.
There are no linux-image-extra packages for upstream kernels in
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.*/
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** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1686788
Title:
External
Tested with v4.4.65, the latest v4.4 stable kernel as of this writing.
The problem happens with that as well.
kernel-bug-exists-upstream tag added and the bug marked Confirmed as
instructed (even though "Confirmed" description says "Verified by
someone other than the reporter.")
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You received
I can also confirm that the problem doesn't occur with linux-
image-4.13.0-38-generic_4.13.0-38.43+lp1759920.1_amd64.deb
cat /proc/version_signature =>
Ubuntu 4.13.0-38.43+lp1759920.1-generic 4.13.16
cat /proc/cmdline =>
BOOT_IMAGE=/vmlinuz-4.13.0-38-generic root=/dev/mapper/kubuntu--vg-root ro
Kubuntu 17.10, kernel 4.13.0-37-generic, Dell E6330 with Intel graphics
(iucode-tool: system has processor(s) with signature 0x000306a9, cpuinfo
attached), after intel-microcode upgrade to 3.20180312.0~ubuntu17.10.1
=> lockup during boot after entering disk encryption password but before
login
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