gma500_gfx: 1 of 5 boot doesn't release the screen to Xorg
Hi, i'm facing a strange issue on a Intel Atom N2600 that use the gma500_gfx as gpu kernel module. Everything seems to work as expected, but sometimes, about 1 times to 5, plymouth works fine, but when Xorg should comes up, the screen still black. Under the hood the system it's working: Xorg starts correctly, if i run a X application it starts ok, but the screen still full black. If i reboot it, i fix the issue until other 4-5 reboots. I've tried to change the DeviceTimeout parameter from 5 to 8: nothing, the error still appears. I've tried also to 20 but error remains.
So i've also tried to debug it, appending the plymouth:debug to my kernel command line: but in this way i've never see the issue! This is strange, isn't it?
So how could i move now in order to understand this issue? Thanks