Afaik, when in e.g. 256-color mode with 8 dots/clock, 8x4-bits are converted into 4 pixels each half clock(the dot clock divided by 4(dot clock with div2(thus character clock), which is divided further by hardware to get a character clock divided by 2 for fetching 4 pixels for each 4 dot clocks(essentially a half character clock as UniPCemu implements it)))).

What I'm wondering about is: what happens when graphics mode is enabled(by setting said bit in all different vga controllers(graphics,sequencer,crt etc.) and 9 dots/clock is selected?

As UniPCemu currently handles it, each 9th clock would starve the buffer(containing only 8x4-bits worth of RAM) on each even character clock(which starts fetching at x-coordinates 4, 12, 20 etc.), thus rendering a pixel with an 256-color index of 0(which usually is black in the DAC palette)?

Or does the VGA ignore the setting when in graphics mode?