https://bugs.freedesktop.org/show_bug.cgi?id=90320
N.Leiten nickleiten@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |nickleiten@gmail.com
--- Comment #8 from N.Leiten nickleiten@gmail.com --- Created attachment 115731 --> https://bugs.freedesktop.org/attachment.cgi?id=115731&action=edit FHD Panel Datasheet.
Due this datasheet the panel looks the same as for DP configuration comparing whith N133HSE-EA1 (asus u38n) panel. So it needs 2 lanes to init video stream.
As for your dmesg, I see problem in dp_aux_ch and training procedure (the voltage and emphasis is 0 which is not right at this point). Need to debug further when I publish my patch and if it not help.
One more thing, do you have FullHD (1920x1080) panel or WHD (1366x768) one. Because on Lenovo site I see Thinkpad e455 base model with WHD. The last one need only 1 DisplayPort lane to work.