Comment 38 for bug 1714178

Created attachment 135996
extend max buffer size for test.

just followed the error from drm.debug=0x5e and tried to force extend max buffer size returned by intel_fb_pitch_limit(), then 3 X 4K monitor works well then.

there are 2 commit b321803dfb and ac484963f9 touched this part, but not sure why it specify (8192 * cpp)? have some better way to extend the size ?

environment setting:
kernel 4.15.0-rc2 [1]
drm, mesa and xorg version: http://paste.ubuntu.com/26124071/

[1] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15-rc2/