On Tue, Dec 11, 2018 at 3:18 AM Kevin Cummings
<cummings(a)kjchome.homeip.net> wrote:
On 12/10/18 9:20 PM, Peter Robinson wrote:
>> Hi Folks,
>> Longtime Fedora user here. Last winter, I got a Raspberry Pi, and
>> installed F28 on it. Using the HDMI output, it works well. Recently, I
>
> Any reason for F-28 instead of F-29?
Lazy? I think you're lucky I upgraded it from the F27 I originally
installed....
>> picked up the Raspberry Pi 7" display (and case). After hooking up the
>> display to the Pi via the ribbon cable, I booted it up.
>>
>> The 7" display works well as the initial console, and I see all the
>> usual messages go flying by. At some point (when it decides to switch
>> to graphics mode) the display goes blank. Nothing on it. I cannot
>> switch even to a virtual console. The new case blocks using the HDMI
>> port, so I had to remove the Pi from the case (while leaving the ribbon
>> cable attached to the display). After plugging a monitor into the HDMI
>> port, what I discovered was that the Pi boots using the display as
>> console, then switches to the HDMI port for the X11 driver. (not useful)
>
> If you block the vc4 driver it will continue to work as a pure non
> accelerated display, at the moment when the accelerated driver
> initialises it can't detect the DSI attached display so it goes blank.
So if I blacklist the vc4 driver, will an X11 session start up on the
display? If not, can I modify the boot up to bring Linux up in command
line only mode? Will the virtual consoles work in that mode?
I don't (yet) understand the uboot stuff. In a PC, I can interrupt grub
and edit the command line to put kernel options on the boot line. I
don't know how to do that with uboot.
U-Boot in basically a firmware so in the context you put it it's not
grub2 or like it, on aarch64 mode on the Raspberry Pi we have grub2,
in F-30 we should this for ARMv7 too, The extlinux boot menu is
rudimentary, it doesn't support editing.
> The support status is documented in the Fedora Raspberry Pi FAQ
[1]
Yes, it talks about supporting the touchscreen display. But there are
two parts: The graphics display, and the touch screen. Is the graphics
screen currently supported?
No
I can wait for touchscreen support.
>> How can I get the X11 display to come up on the 7" display in graphics
>> mode. What do I need? A new xorg-x11-drv driver? A newer kernel?
>
> The Raspberry Pi doesn't have, nor will ever have a xorg driver. The
> driver is a 3D mesa accelerated driver, the 2D support is via glamor
> (2D over 3D) to mesa.
Sorry, in all the PCs I've every used, there has been a specific driver
to get X11 to run (reasonably) on every different video card I've had to
run X11 on. I'm not familiar with using them as only frame-buffer. So
this is new territory for me.
X11 drivers are going away, even in the PC case, EG these days for new
intel devices it uses mesa/3D glamor for Xorg too.
> > The upstream open source driver we use doesn't yet fully support the
> > touch screen display, I don't believe it's far off but upstream is yet
> > to finish the work to have it supported.
>
> Yes, that's what [1] says.
>
> >> I'd like to turn this into a MythTV server (with a USB capture) and use
> >> the display as a system console with the ability to watch videos on it.
> >> (Yeah, I'm aware that its only a 800x400 screen.) Failing that,
I'd
>
> I should have said 800x480 screen, and I also see that text mode
> actually runs at 720x480?
>
> >> like to use it in a "tablet" mode and get used to the touch
screen
> >> interface.
> >
> > Well when it's supported upstream it will be enabled.
> >
> > [1]
https://fedoraproject.org/wiki/Architectures/ARM/Raspberry_Pi#Is_the_Rasp...
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>
> Thanks for the help so far.
>
> --
> Kevin J. Cummings
> cummings(a)kjchome.homeip.net
> cummings(a)kjc386.framingham.ma.us
> kjchome(a)icloud.com
> Registered Linux User #1232 (
http://www.linuxcounter.net/)
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