I also found out the issue exits while on 16.04.2 and upgrading to the hwe. It
happened after the install of package
xserver-xorg-hwe-16.04
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So I tried it, installed 16.04.1 fresh, updated to 16.10 but I'm still
missing the resolutions. It has nothing to do with previous installed
versions before 16.04.
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Hmm.. It might be something that's specific to the earlier install. I
think i upgraded from 15.10 to 16.04 to 16.10. On a different system
(Dell T3420) I installed 16.04 and upgraded to 16.10. That system has 2x
4k screens and shows also the lower resolution of 2560x1440.
I'm gonna try a fresh
I seem to have been experiencing some instability due to this kernel
downgrade so I'm now back to the stock 16.10 linux-generic to see how
things hold out. Using an .xprofile file with the appropriate commands
for my HP Envy 34c:
xrandr --newmode "3440x1440_60.0" 196.25 3440 3600 3952 4464 1440
Downgrading to the 4.4 kernel solved this issue for me. Specifically I
installed the 4.4.28 mainline build.
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.28/
Not ideal but avoids messing around with modelines et. al. for the time
being.
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Hi,
As a fix for problems in 16.04, I had a grub option in my
/etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=0"
After removing this option I can now set my brightness and the
resolution of the screen
NOW:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: unity (Ubuntu)
Status: New => Confirmed
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