Re: Set screen resolution in X.

[Thompson, David]

On Mon, Aug 10, 2015 at 2:16 PM, Camel <address@hidden> wrote:
> Not sure if this is a bug or misconfiguration.
> Here is relevant part of my config.scm
>
> (use-modules (gnu)
>                (gnu system nss)
>                (gnu services xorg))
> (use-service-modules desktop)
> (use-package-modules xfce ratpoison wicd avahi xorg certs)
> ;;;System definition cut away.
>    (services (cons* (slim-service #:startx (xorg-start-command
> #:configuration-file (xorg-configuration-file #:drivers '("radeon" "vesa")
>                          #:resolutions '((1366 768) (1024 768)))))
>                    ;;%desktop-services
>                    %base-services))
>
> But when I run gux system reconfigure /etc/config.scm I get error:
>
> substitute: updating list of substitutes from 'http://hydra.gnu.org'...
> 100.0%
> The following derivations will be built:
>    /gnu/store/hap769hzynkhcqin9ynvjnsf4rdgphyv-system.drv
>    /gnu/store/g285cghja69w8lamlir2w1w1w0axa35a-grub.cfg.drv
>    /gnu/store/3x9qz66gpqisa18hzjbjj6rbm6cxfsq7-slim.cfg.drv
>    /gnu/store/f9adqf84wq70lakxfmh4f4cn6xwhszdb-dmd.conf.drv
>    /gnu/store/45fhs53hdy98j10h2bnm4ilqy70sg96i-boot.drv
> ERROR: In procedure primitive-load:
> ERROR: In procedure scm_lreadr:
> /gnu/store/6bhrflbps4mav5yv5mas6fazcb59734f-slim.cfg-builder:1:159: Unknown
> # object: #\<
> builder for `/gnu/store/3x9qz66gpqisa18hzjbjj6rbm6cxfsq7-slim.cfg.drv'
> failed with exit code 1
> cannot build derivation
> `/gnu/store/f9adqf84wq70lakxfmh4f4cn6xwhszdb-dmd.conf.drv': 1 dependencies
> couldn't be built
> cannot build derivation
> `/gnu/store/45fhs53hdy98j10h2bnm4ilqy70sg96i-boot.drv': 1 dependencies
> couldn't be built
> cannot build derivation
> `/gnu/store/hap769hzynkhcqin9ynvjnsf4rdgphyv-system.drv': 1 dependencies
> couldn't be built
> guix system: error: build failed: build of
> `/gnu/store/hap769hzynkhcqin9ynvjnsf4rdgphyv-system.drv' failed
>
> Please, help me set screen resolution on my laptop.Thanks in advance.

I believe this is because the return value of
'xorg-configuration-file' is a monadic value, and thus it needs to
"unwrapped" in order to pass the configuration file to
'xorg-start-command'.

Try this:

    (mlet %store-monad ((config
                         (xorg-configuration-file #:drivers '("radeon" "vesa")
                                                  #:resolutions '((1366 768)
                                                                  (1024 768)))))
      (slim-service #:startx (xorg-start-command #:configuration-file config)))

- Dave