On Wed, May 31, 2017 at 3:44 PM, Allan Streib <astreib@indiana.edu> wrote:
>> You may be able to get a higher resolution by decreasing the refresh rate:
>>
>> $ gtf 2560 1440 33
>>
>> # 2560x1440 @ 33.00 Hz (GTF) hsync: 48.44 kHz; pclk: 162.77 MHz
>> Modeline "2560x1440_33.00" 162.77 2560 2688 2960 3360 1440 1441
>> 1444 1468 -HSync +Vsync
>>
>> $ xrandr --newmode 2560x1440_33.00 162.77 2560 2688 2960 3360 1440
>> 1441 1444 1468 -HSync +Vsync
>> $ xrandr --addmode DVI-0 2560x1440_33.00
>> $ xrandr --output DVI-0 --mode 2560x1440_33.00
>
> Yes, that actually worked! I tried first at 50Hz and it did not, but
> 33Hz is working at 2560x1440 (but not in console however, I don't know
> how to specify a different mode there, if it's even possible).
DVI limits the clock frequency to 165 MHz (the first number on the
mode line). You may be able to go beyond that by using a DisplayPort
cable instead.
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