[Bug 99362] no resolutions >=1080p with Acer P7500 and Thinkpad X1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99362

--- Comment #12 from Michael Heide <m.heide at tarent.de> ---
Sorry but I don't get it. 

ca6e4405779ed56ebac941570615abd667c72c02 and newer is bad while
ccfb8b2ed4d4e12c3c35de3db5fbbbaa11277736 and olders (in that line) are good. 

But 8f539a83efa7dceb7c2257ca96e2dfc846bd12f6 - which is the other parent of
ca6e4405779ed56ebac941570615abd667c72c02 besides
ccfb8b2ed4d4e12c3c35de3db5fbbbaa11277736 - and all others I tested so far in
that line do not boot at all. Grub loads initrd and kernel, then a black screen
and (sometimes) a blinking cursor appears. 

What am I doing wrong?

I compiled all those commits and all of them do not boot into a running system:
97173eaf5f33b1e85efdb06d593d333480b60bf3 
e62925567c7926e78bc8ca976cde5c28ea265a49 
d04df7325ac9def8c4a68b49822c1d0a0c5379c6 
3e6da4a9d9005fbc83420686fb897bd8ad749e91 
eeebeac5e476800991ea1d10827307c41650ba11 
8f539a83efa7dceb7c2257ca96e2dfc846bd12f6 
ce65e47b78789b4f78be1fd7e4c884df74a9f075
346add7834557b5b9628b9bf2387106d42e631d4 
793dfa59bcfde9d642295480674926827e9adcfc 
05712c1561041d102d3cac7d7e79548b1446caa4 
f8896f5d58e64bfd3c2b5f7c5ba5c3f3967e93c7 

Are all those commits are indeed broken or am I missing something?

(btw: f8896f5d58e64bfd3c2b5f7c5ba5c3f3967e93c7 is one of those in the line of
non-booting kernels. I don't get it, but either I have mistakenly used this as
a "good" example in my initial bug report, or I indeed was able to successfully
compile and boot it back then?)

What I do:
git clean -dfX # only if not a clean git clone
git checkout or bisect good/bad/skip
cp /boot/config-$(uname -r) .config
yes "" | make oldconfig
fakeroot make-kpkg -j5 --initrd --append-to-version=-sometag kernel-image
dpkg -i ...
reboot

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