<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - eDP -> Dual Channel LVDS bridge unable to accept any modelines: Corrupt display!" href="https://bugs.freedesktop.org/show_bug.cgi?id=112008#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - eDP -> Dual Channel LVDS bridge unable to accept any modelines: Corrupt display!" href="https://bugs.freedesktop.org/show_bug.cgi?id=112008">bug 112008</a> from <a class="email" href="mailto:Babblebones@gmail.com" title="Babblebones@gmail.com">Babblebones@gmail.com</a> <pre>(In reply to Alex Deucher from <a href="show_bug.cgi?id=112008#c4">comment #4</a>) > Can you use git bisect the issue and find the exact commit that broke it or > narrow down when the regression happened? E.g., working in 4.17-rc3 and > broken in 4.17-rc4? I have two commits that break my EDID reading and cause the exact same issue so far. bisected the mainline to try and find the issue, trailed into your drm-next git... The first commit I found that broke my EDID read: <a href="https://cgit.freedesktop.org/~agd5f/linux/commit/?h=amd-staging-drm-next&id=8a61bc085ffab3071c59efcbeff4044c034e7490">https://cgit.freedesktop.org/~agd5f/linux/commit/?h=amd-staging-drm-next&id=8a61bc085ffab3071c59efcbeff4044c034e7490</a> Was later reverted. Followed more commits after this one down a branch and into here... <a href="https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86-urgent-for-linus&id=bd4caed47a19f25fe8674344ea06d469c27ac314">https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86-urgent-for-linus&id=bd4caed47a19f25fe8674344ea06d469c27ac314</a> Surprisingly, swapping out the memory allocs actually breaks the EDID read in this commit/ branch too. I know for a fact Ubuntu's old kernel 4.18 reverted this specific and the treewide memory allocation change, which worked!? I stopped about here, my head was starting to spin as to why THAT would do anything. I am ready and able to fork over any binary/parameter/debug dumps to help solve this.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>