I may have found a workaround. I looked at my grub.cf and the default
"Ubuntu" entry looked like this:
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os
$menuentry_id_option 'gnulinux-simple-ff6d751f-0284-4831-8972-db64642e66a2' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_msdos
insmod ext2
set root='hd1,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos1
--hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1
ff6d751f-0284-4831-8972-db64642e66a2
else
search --no-floppy --fs-uuid --set=root
ff6d751f-0284-4831-8972-db64642e66a2
fi
linux /boot/vmlinuz-4.10.0-40-generic rootfstype=ext4 root=/dev/sda1
ro quiet
initrd /boot/initrd.img-4.10.0-40-generic
}
I decided that most of the above code is "unnecessary junk" ;) and
reduced it to the following nice and compact entry:
menuentry 'Test' --class ubuntu --class gnu-linux --class gnu --class os
$menuentry_id_option 'gnulinux-simple-ff6d751f-0284-4831-8972-db64642e66a2' {
insmod gzio
insmod part_msdos
insmod ext2
linux /boot/vmlinuz-4.10.0-40-generic rootfstype=ext4 root=/dev/sda1 ro
quiet
initrd /boot/initrd.img-4.10.0-40-generic
}
In the old days I would get rid of initrd as well, but nowadays things
got a little bit more complicated, so I left it there (it would save
only about 1/3 of a second on boot and it is already very fast at less
than 2.5 seconds).
Anyway, the "Test" entry boots absolutely fine and, most importantly,
the Dell monitor is now always at 1920x1200 resolution which means the
top panel in Unity is NOT reset to Ambiance. It stays light, i.e.
remains in the Radiance theme.
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https://bugs.launchpad.net/bugs/1736723
Title:
GTK Theme is reset to Ambience on almost every reboot
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