On Fri, Feb 8, 2013 at 2:51 PM, "David M?ller (ELSOFT AG)" <d.mueller at elsoft.ch> wrote: > > Hello > > I have a problem using a 1024x768 Eizo Monitor attached by DVI-D to a > system with GMA500 based graphics and running under Linux-3.7. > > As soon as the GMA500 driver is taking over control, the refresh > rate raises to 64.5Hz and the monitor reports a "signal error". > > For me i looks like the GMA500 driver is reprogramming the VCO to a too > high dot clock. If i lower the "I9XX_VCO_MIN" value to 1300000, > everything is fine. > > Is the "I9XX_VCO_MIN" value used in the GMA500 driver correct? > > > Dave
Hi Dave The value of VCO_MIN comes from the Intel PRM for similar GPUs. Instead of changing VCO_MIN, could you try setting N_MIN=1, N_MAX=6 and M1_MAX=22? I'll test it on my own hardware tomorrow. -Patrik
