Re: Nvidia Optimus, Debian 10, and Firefox ESR crashes

[Darac Marjal <mailinglist@darac.org.uk>]

On 05/01/2021 08:27, Felix Miata wrote:
> Andrei POPESCU composed on 2021-01-05 09:14 (UTC+0200):
>
>> David Christensen wrote:
>>> Alexander V. Makartsev wrote:
>>>> "xrandr" utility should help you with diagnostics and setup:
>>>>      $ xrandr -q
> $ xrandr | wc -l
> 17
> $ xrandr -q | wc -l
> 17
> $ xrandr | wc -c
> 706
> $ xrandr -q | wc -c
>
> I have no idea why the -q switch exists.

From the manpage:

    -q, --query
              When this option is present, or when no configuration
changes are requested, xrandr will display the current state of the system.

So, the point of it appears to be either to report back the results of
configuration changes, or to display the initial state of the system
before the change. It depends on how "current state" is determined.
Yeah, that's a confusing option.


>
>>> 2021-01-04 19:22:57 root@dipsy ~
>>> # xrandr -q
>>> Can't open display
>> The '$' in the post above means it should be run from a user account, 
>> preferably within the X session.
> Xrandr is an X utility. X provides the "display".
>
> Inxi -G OTOH, can be run from without X, but X-specific information will be absent.

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