"sudo apt-get install xserver-xorg-core-dbg libdrm2-dbg" should work, their versions must match the xserver-xorg-core and libdrm2. Did you also try "NoAccel" or UXA or the xorg-edgers packages?
"sudo apt-get install xserver- xorg-core- dbg libdrm2-dbg" should work, their versions must match the xserver-xorg-core and libdrm2. Did you also try "NoAccel" or UXA or the xorg-edgers packages?