Re: Acer E3-112 and UEFI

On 12/30/14 06:40, Jakob Alvermark wrote:
> Hi,
>
> Have been playing with this machine for a while now.
> It is a quad core Pentium N3540 (ValleyView/Bay Trail), 8 GB RAM. It came
> with a Broadcom WiFi card which I swapped for an Intel which is supported
> by FreeBSD. Also swapped the hard drive for an SSD.
>
> When first trying to boot FreeBSD with UEFI it would not boot.
> It stops after the loader is trying to start the kernel.
> My workaround now is using refind, http://www.rodsbooks.com/refind/
> to set the screen resolution to 800x600. (Native is 1366x768)
> Only then will it boot using UEFI.
> I tried setting it to 1024x768, then it crashes. If it helps I can get the
> backtrace.

[Not sure what's going on here]

> The other "interresting" thing is that when UEFI-booting the
> sdhci-controllers is not detected. (There are two, one card reader, and I
> guess one for internal eMMC that is not present in this model).
>
> Booting with legacy BIOS:
> # pciconf -l| grep sdhci
> sdhci_pci0_at_pci0:0:18:0:	class=0x080501 card=0x09331025 chip=0x0f168086
> rev=0x0e hdr=0x00
> sdhci_pci1_at_pci0:0:23:0:	class=0x080501 card=0x09331025 chip=0x0f508086
> rev=0x0e hdr=0x00
>
> Booting UEFI they are simply not there...

At least sometimes, the CSM is involved in initializing some peripherals 
(this happens with an isci(4) SAS controller I have, for example) and 
disabling it will result in them not appearing. This is a BIOS bug, 
unfortunately.

>
> Also Xorg only works with BIOS. (Only VESA. I guess VESA drivers depends
> on BIOS? For proper X support I guess I have to wait for the Haswell
> drivers)

You can use xf86-video-scfb for a VESA-like experience on EFI systems.
-Nathan