[Bug 215511] Dual monitor with amd 5700 causes system to hang at startup.

[bugzilla-daemon at kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215511

--- Comment #3 from Alex Deucher (alexdeucher at gmail.com) ---
Here's a howto for doing a bisect:
https://www.kernel.org/doc/html/latest/admin-guide/bug-bisect.html
Here's a howto for building a kernel:
https://kernelnewbies.org/KernelBuild

Basic process:
# create a directly to store your git source
mkdir kernel
# change to that directory
cd kernel
# clone the stable git tree
git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
# copy your distros config to use for your build, replace #whatever with
# whatever config your distro is using
cp /boot/config-#whatever .config
# start bisecting
git bisect start
# tag 5.15.13 as bad
git bisect bad v5.15.13
# tag 5.15.2 as good
git bisect good v5.15.12
# build the first kernel to test
make clean
make
make modules_install
make install
# test the new kernel
# if it's good, mark it as good
git bisect good
# if it's bad, mark it as bad
git bisect bad
# build the next kernel to test
make
make modules_install
make install
# test the new kernel
# repeat until the bisect is complete

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