Another observation: booting with 4.4.0-22-generic is successful if I
have an external HDMI display connected.
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Title:
Regression: drm / modesett
I've checked the mainline kernels and determined that 4.2.0-040200
exhibits the problem, while 15.10's 4.2.0-35-generic is ok. I don't know
how to proceed from here to determine the differences between the two.
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If I get a chance I'll try to establish which kernel introduces the
regression.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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AFAICT I did -- I tested 4.6-rc7 from
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-rc7-wily/
I can't go any further than installing and testing ready-built kernel
deb packages, I'm afraid.
** Tags removed: ubuntu
** Tags added: ubuntukernel-bug-exists-upstream
** Tags removed: ubuntukerne
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.6 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix th
I've now tried with combinations of the kernel options:
acpi_backlist=vendor
and
video=eDP-1:1366x768e
without apparent change in behaviour
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Titl
ditto 4.6.0-rc7
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Title:
Regression: drm / modesetting failure for i915
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Just tried 4.5.3-040503-generic from the mainline ppa repo
http://kernel.ubuntu.com/~kernel-ppa/mainline
The behaviour is superficially the same as with 4.4 -- nomodeset is required to
boot.
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