01:00.0 VGA compatible controller: ATI Technologies Inc M76 [Radeon Mobility HD 2600 Series]
agd5f on IRC suggested to try 'avivotool regset 0x458 0x00000000' or 'avivotool regset 0x45c 0x00000000'. The first command fixes it (didn't try the second one).
I have the same VGA ripple effect.
01:00.0 VGA compatible controller: ATI Technologies Inc M76 [Radeon Mobility HD 2600 Series]
agd5f on IRC suggested to try 'avivotool regset 0x458 0x00000000' or 'avivotool regset 0x45c 0x00000000'. The first command fixes it (didn't try the second one).
avivotool is a part of radeontool and can be found here: http:// cgit.freedeskto p.org/~ airlied/ radeontool