First steps with Sculpt on Dell XPS 13

Wed Sep 5 21:44:26 CEST 2018

Hi,

I have a XPS 15 (9550) - so I guess a somewhat similar device. I encountered the
same (or similar) issues. I didn't get as far as trying an external display, so
I can't say anything about that.

Is there a reason why higher resolutions than 2560x1440 aren't supported?

As stated in another mail there is no support for other wifi devices except
iwlwifi (afaict) or possibly usb attached nics so far.

If I can get the display issue resolved, I'd put some time into porting the
wifi driver...

WKR
Hinnerk

On Wed, Sep 05, 2018 at 06:51:07PM +0200, Roman Iten wrote:
> Hi,
>
> for some time now I've been thinking about upgrading:) my day-to-day
> operating system from bare metal Linux to Sculpt. My Dell XPS 13 (9350)
> doesn't boot out of the box and I didn't had the time to investigate.
> Now the cool new report_dump gives me a chance to easily spot problems
> when using Sculpt on my laptop.
>
> So I prepared "Sculpt as a hardware-probing instrument" as described in
> the release notes [1]. But it seems like the XPS doesn't boot far enough
> as no reports are dumped...
>
> I suspected there's probably an issue related to the XPS' display
> resolution of 3200 x 1800. After all it's clearly been declared in
> Sculpts hardware requirements [2], that displays with a higher
> resolution than 2560 x 1440 "are not expected to work". I tried to
> artificially restrict the resolution to FHD [3]. The internal display
> still doesn't work, but when an external monitor is connected via an
> USB-C dock or adapter (!), the Leitzentrale is displayed and the
> report_dump subsystem dumps reports to the flash memory.
>
> Using Leitzentrale, I then updated config/fb_drv to enable the internal
> display with it's native resolution. All screens go blank, but now I
> have a log to share [4] (the reconfiguration of the fb_drv happens after
> line 500)
>
> So far my very first experiences with Sculpt on the Dell XPS 13. And
> here some related questions:
>
> 1. What do you think about the idea to generally restrict the resolution
> of the initial fb_drv configuration to the maximum resolution supported
> by Sculpt (instead of that of the connected display(s), which may break
> Sculpt), similar to [3]? This would also help if, for example, an
> external 4K TV is connected during boot.
>
> 2. On Sculpt, most/all? internal displays report only their native
> resolution. On the XPS this is 3200 x 1800 and I can't force a lower
> resolution. Although under Linux, xrandr reports a bunch of supported
> resolutions from 3200 x 1800 down to 640 x 360. Does the intel_fb_drv
> under Genode intentionally reports and supports only the native resolution?
>
> 3. Should I create an issue regarding [4] on GitHub?
>
> 4. Instead of installing Sculpt directly on my current laptop I consider
> to buy a new XPS 13 (9370). It has a Killer 1435 wireless module
> featuring a Qualcomm Atheros QCA6174A chip which seems to be supported
> on Linux by the ath10k module... Has someone any experience (or
> assumptions) whether there's a chance that it will work on Sculpt (right
> now or in the near future)?
>
>
> Cheers, Roman
>
>
> [1] https://genode.org/documentation/release-notes/18.08
> [2] https://genode.org/documentation/articles/sculpt-tc
> [3]
> https://github.com/rite/genode/commit/ba65d4307e892320b791b52cdccca1d421694f5a
> [4]
> https://gist.github.com/rite/1e5602c9ed55a810fe9306475e3962c0#file-log-L501
>
>
>

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