ALLM causing lag spikes/screen jumps every 5 seconds

[Nawwti]

Yeah it says on the hdmi3 that turning on compatibility lowers picture quality, so it's a no go.

Keep it on hdmi 1, then in the sky connected devices section, go to hdmi, & turn off auto low latency mode to lose the jitter but gain desync. You can also turn it off in the Xbox settings, it's in the video mode section, it opens a page of choices like 'allow 50hz etc" & you'll see low latency mode, uncheck that box.. No idea what it's like in a driving game but in first person shooters both the jitter & desync are unbearable. You may have to turn the TV off & on to see the changes.

[Nawwti]

So PS2 doesn't support hdmi 2.1, only series S/X & ps5 support hdmi 2.1 & auto low latency mode needs hdmi2.1 to work, so the PS2 isn't jittering because it's not on allm.

Pretty sure I tried an old hdmi 2.0 in my series S & it still had crazy desync. Was trying to work out why it's so bad now with it off when it wasn't before.

It's gotta be a software issue caused by then adding allm which means it's fixable, but they've gone quiet & it's been months. 

[Robmcc83]

Yeah makes sense now you have explained.

So this issue has to be with the ALLM on the sky glass tv.

It's a shame really because I m quite happy with the tv in regards to everything else.

At first I just though maybe it was a certain game skipping frames, then the other night my daughter was playing fortnite and I noticed it stuttering quite a bit and today I've had my driving sim out, jumped onto ea sports wrc rally came and I noticed it straight away! Gone to go on black ops tonight noticed it and that's when I found my self here only to find others with the same problem. I'm sure when I ordered the tv it said I could return within 31days if I was not happy so I suppose I'll leave it a few days for now see if anyone responds on here and if not I'll be sending it back!

[Robmcc83]

Has anyone disabled 50hz and 24hz on the xbox?

I assume this would force the xbox to stay at 60hz.

I wonder if it could be a frame rate issue on the tv.

Have you ever watched a movie/tv show for example 60hz video on 50hz device?

When the camera pans on movie scenes there is every few seconds a stutter like it skips a frame to compensate. 

Very much like what we are experiencing on these consoles with the glass tv

[Nawwti]

I genuinely had no issues regarding jitter or desync for over 2 years, & I didn't realise they'd added ALLM at first, I play destiny usually, & their servers cause weird jumps sometimes so I thought it was the game, or my new series X I'd bought off ebay n had a few days. I actually sent it back as faulty & got a 2nd series S (I have 1 upstairs & 1 down) & that did it too. Then i ended up here thinking it was actually my TV. Took a lot of testing to find out what was causing it,I had to rule out interference, router, TV, consoles, hdmi cables, hdmi ports, all kinds of settings on & off.

The only relief is the workaround, it's a pain but i tend to play destiny or black ops for 2-3 hours without turning over so it's ok for now. Hoping it's fixed but if not we'll look at a new TV next summer

[Nawwti]

I don't think I tried that but I'm pretty sure it's the actual update. I did have a theory but it seems it's wrong.

So ALLM requires hdmi 2.1 & 120hz refresh rate to work, but the glass TV maxes at 60hz, so I figured whatever the Devs did to add ALLM was a workaround to work at 60hz, so it was somehow compensating by maybe cutting frames & this was causing the jitter, BUT this doesn't explain why the jitter goes away when you turn the plug off then off, it works perfectly then, until you turn over. So as someone explained it has to the a software issue, so fixable.

Thing is, this update was in June I think, & I got my series X & noticed it in august, & I simply refuse to believe I played on series S for months with this jitter & only noticed it when I got my X.  I think I'm getting old lol

[Robmcc83]

Could my theory be correct then.

Is the tv not switching frame rate correctly.

Could it be the tv is defaulting 50hz but the content being displayed from the xbox be 60hz?

That would cause jitter as is does on videos etc that why most devices have something call auto frame rate these days to match the content.

Maybe when you are unplugging the tv and switching to the xbox because that's the first image displayed it will display at 60hz

Problem is we can't find out, all other tv brands you can press the info button and it will always tell you what hz it is currently in