Re: Blank screen after boot with Radeon HD 5450

As mentioned, I booted another OS from a USB stick and it runs at
2560x1440@60MHz. Doesn't this make it unlikely that the issue is with
the monitor or cable? Also, the connection is via DisplayPort, even
the most basic version of which shouldn't struggle with this
resolution.

Is there not a more systematic way of debugging this? I find it
puzzling that none of the logs contains any error message.


On Tue, May 30, 2017 at 9:42 AM, Allan Streib <astreib@indiana.edu> wrote:
> Maximilian Pichler <maxim.pichler@gmail.com> writes:
>
>> 2560x1440 59.95*+
>> 2048x1152 60.00
>> 1920x1200 59.88
>> 1920x1080 60.00 50.00 59.94 30.00 25.00 24.00
>
> [...]
>
> Try connecting a lower-resolution monitor and see if it works, if you
> have one.
>
> I have found that my dual 2560x1440 monitors, connected with DVI->HDMI
> cables, are not capable of 2560x1440 I believe this is due to limits of
> DVI. However the monitor and/or the card does not realize this and
> reports 2560x1440 60Hz as the "preferred" mode.
>
> I have a ATI Radeon HD 5870 card.
>
> If I connect one monitor with an HDMI cable I can see the console. With
> two monitors connected with DVI->HDMI I do not. I have to do a "blind"
> login then run "startx" and all is well.
>
> Allan
>
>