I've made some progress in testing. I've seen three states that any
particular configuration boots into. I wrote pass for the one where the
video appears normal, fail for the one where the video appears
interlaced (also with strange colors), and blank for a third possibility
where the screen is blank. Some of the comments below apply to other
kernels than the ones I list them with, but I only listed them with the
kernel versions I positively tested them on:
ubuntu-12.04.1-desktop-amd64.iso combined with any appropriate kernel is a pass:
3.2.0-23: pass, linux console has huge font, flashes trash on mode switch
3.2.0-60: pass, linux console has normal font, becomes blank (irreversibly)
when switching virtual terminals or logging out (but not when shutting down)
3.2.0-61: pass
ubuntu-12.04.2-desktop-amd64.iso: mixed, see below
3.5.0-23:fail, linux console has normal font
3.5.0-23 comes with the iso; the other kernels I tested, I got by git checkout
from git://kernel.ubuntu.com/ubuntu/ubuntu-quantal.git. Here is the version
range that seems interesting:
3.5.0-16.25: pass
3.5.0-17.26: blank
3.5.0-17.27
3.5.0-17.28: blank
3.5.0-18.29: blank
3.5.0-19.30
3.5.0-20.31
3.5.0-21.32: fail
I presume that the appropriate range for bisection is 3.5.0-16.25 to
3.5.0-17.26. I need to learn about git bisect, but I get the impression that it
amounts to automated checkout of versions for a binary search for the offending
commit.
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https://bugs.launchpad.net/bugs/1300349
Title:
8086:0a16 [Dell Inspiron 17R 5737] Video looks interlaced
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