[ubuntu-za] Not Optimum Mode

[Matthew French]

On Tue, Nov 22, 2016 at 2:21 PM, Midrand Opensource <
midrandopensource at gmail.com> wrote:

> Yes... It's a Samsung monitor: a SyncMaster 720N. The only other monitor
> I've got is also a Samsung. But I don't think it's the monitor as both
> monitors give me the same error message and they both work just fine on my
> girlfriend's Lubuntu system.
>

Its probably a combination of video card and monitor, but sounds
suspiciously like the Samsung monitors don't support unusual screen
settings - it's probably the refresh rate being set too high? Maybe because
the graphics card is not detecting the monitors capabilities correctly?


> The really strange thing is that after every nth time (a dozen or so) it
> will boot! So there's a degree of randomness that confuses me: it should
> either work, or not work. Not work sometimes...
>

If you could see the screen, the randomness would probably be explained by
the error message it thinks it is showing you. :-(


> Also... is it not possible to use whatever driver Ubuntu uses when it
> installs the system? Although it's not pretty, I can see the screen just
> fine during installation. It's only when installation is complete and I
> reboot that I get a problem.
>

Usually installers will use the lowest common denominator text mode, but
once installed will switch to a frame buffer (graphics mode drawing text on
the screen). The switches I sent through are supposed to do this, forcing
GRUB and the kernel to use the standard text mode.

Unfortunately I still think the easiest way to solve this would be to find
a non-Samsung monitor. Once you can see what is going on, you can change
the settings and then go back to using your Samsung monitor.

HTH,

- Matthew
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