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<Guest26>
hi
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<Guest55>
This is regarding Beaglebone startup logo which is disabled in am335x-debian-11.4-minimal-armhf-2022-08-01-2gb, i am trying to enable it, but no success
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<zmatt>
Guest26: u-boot has never had display initialization on the beaglebone to show a boot logo, I'm not sure it even has a driver for the am335x's lcd controller
<zmatt>
unless you mean the tux logo once the kernel loads?
<zmatt>
(I think lcdc is initialized too late for that anyway)
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<zmatt>
oh wait, that was a different guest asking the question, whoops
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<Guest7>
Hello,
<Guest7>
I have some trouble with the BBB black industrial.
<Guest7>
I'm using it with a screen by using HDMI.
<Guest7>
I have a bbb console image, and installed xorg to start a GUI Application.
<Guest7>
My GUI is vertical, so, i rotated the screen by modifying the xorg.conf file.
<Guest7>
Unfortunately, when the GUI is rendered on actions, the screen is *very* slow to load (I mean that you can see like the screen refreshing (from top left to bottom right))
<Guest7>
Does anyone have an idea of where does it comes from ?
<Guest7>
(for sure i made research on internet but i didn't found something that really is close to my problem).
<Guest7>
Thanks in advance.
<zmatt>
I'd imagine rotating the screen in software will not perform well, though I wouldn't expect it to be as slow as you're describing
<zmatt>
(depending on how well that rotation has been implemented)
<zmatt>
lcd displays which are natively vertical do exist (they're used e.g. for phones) though I'm not sure how easy it would be to find a natively vertical hdmi screen
<zmatt>
what sort of resolution are you using?
<Guest7>
Maybe the description is exaggerated because of the language barrier (not native speaker) (although the idea is there).
<Guest7>
What do you mean by "how well that rotation has been implemented"?
<Guest7>
Would you see another way to do it?
<Guest7>
I'm using a 1024x768 screen resolution
<zmatt>
I mean, I don't know what's doing the rotation for you, but there's no support for it in hardware so it must be done in software, presumably by xorg itself
<zmatt>
rcn-ee: I seriously doubt that works when the dri device doesn't support rotation?
<zmatt>
(lcdc doesn't support it)
<zmatt>
ideally you'd use a panel whose native resolution matches your application... I know natively vertical 768x1280 screens exist, not sure about 768x1024 though
<Guest7>
Nrcn-ee :
<Guest7>
no i didn't,
<Guest7>
I'll dig in and try. Thanks for the research lead!
<zmatt>
I'm 95% sure that will not do anything useful for you
<Guest7>
I developed my application in 768x1024 and the screen is also a 768x1024
<zmatt>
if the screen is 768x1024 (rather than 1024x768) you wouldn't need to configure rotation
<Guest7>
I had not made the difference (1024x768) != (768x1024) when I answered.
<Guest7>
Indeed, I have a 1024x768 and not 768x1024
<zmatt>
of course it's easy to check if the rotation is to blame: try it without rotation (even if that means the application doesn't quite fit) and check how much faster that renders
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<Guest7>
I made the test and it work perfectly on horizontal.
<Guest7>
The "funny" thing is that, i tried it (horizontal + vertical) with my desktop and the same software on the exact same screen and everything worked perfectly.
<Guest7>
It's why I'm thinking that my BBB configuration is wrong (my way to do it)
<zmatt>
your desktop is much much faster than the bbb and more importantly probably supports screen rotation in hardware
<Guest7>
Ok i see what you mean,
<Guest7>
It explain then why the problem appear on a different screen (i tried it with the bbb on vertical with another screen)
<zmatt>
wait you're saying this problem occurs with some screen but not another screen, both on the BBB ?
<zmatt>
or am I understanding that wrong?
<Guest7>
no sorry,
<Guest7>
I mean it occurs with the two screens I tested (BBB + Screen 1 Vertical / BBB + Screen 2 Vertical ==> Same problem)
<zmatt>
yeah that's to be expected
<zmatt>
it's quite possible that whatever code is doing the rotation for you is just poorly optimized, or at least poorly optimized for the BBB
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<Guest7>
Ok, thank you very much.
<Guest7>
I'll try to work with the elements you gave me to find a solution
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