[SOLVED] Browser "jitter"

rnturn · 06-08-2019, 09:08 AM

I've been seeing a really annoying thing in my browser windows lately. At random intervals, the contents of the browser windows jitters horizontally. The effect only lasts for less than a second most of the time. At times the effect lasts for a couple of seconds. The rest of the desktop is <i>not</i> affected by this.

Environment: Leap 15.1, nVidia graphics card + nVidia driver

I'm mostly using Chrome which is where I notice this the most. I actually began seeing this on older systems but I'm noticing it more on my recent upgrade to Leap. I'd rather hoped that updating my desktop from the out-of-date version of openSUSE I'd been running would improve the situation but, if anything, it's worse. On the older systems I never noticed the jitter when using Opera but since they switched to the Chrome engine, I'm seeing it with that browser, too. Firefox seems to be immune.

Anyone else seeing this? Any ideas as to what's causing it? (Are these just changes being made to The Matrix?)

TIA...

mrmazda · 06-08-2019, 11:59 AM

Quote:

Originally Posted by rnturn

Any ideas as to what's causing it?

CSS applied according to viewport size and/or screen resolution. Likely a bug that occurs when you land on the fence between breakpoints. What screen resolution(s) do you use? Does this happen regardless whether the browser window is fullscreen or not? You might be able to find an existing bug report in the Blink tracker. If not, consider filing one.

ugjka · 06-08-2019, 12:04 PM

Could be HW acceleration problems in Chromium engine. Muck around with HW stuff in about:flags

rnturn · 06-08-2019, 01:51 PM

Quote:

Originally Posted by mrmazda

CSS applied according to viewport size and/or screen resolution. Likely a bug that occurs when you land on the fence between breakpoints. What screen resolution(s) do you use? Does this happen regardless whether the browser window is fullscreen or not?

It's hitting all Chrome window simultaneously so I can't see where it would be CSS-related. I rarely, if ever, use a browser window full-screen so I can't tell if that's got anything to do with it.

rnturn · 06-08-2019, 02:04 PM

Quote:

Originally Posted by ugjka

Could be HW acceleration problems in Chromium engine. Muck around with HW stuff in about:flags

I actually had just turned off the hardware acceleration option just before reading your reply a few minutes ago. So far, no jitters. They were happening so frequently that I expect I'd have seen some by now. I'll leave it off for a while, then re-enable it later to see if the jittering returns. If so, I can look at whatever options exist for fine tuning the use of hardware acceleration. If there's only one big switch and it's all or nothing, I'll just leave it off.

Thanks...

rnturn · 06-09-2019, 11:16 AM

Quote:

... I can look at whatever options exist for fine tuning the use of hardware acceleration. If there's only one big switch and it's all or nothing, I'll just leave it off.

I didn't see any fine-grained options regarding hardware acceleration. Briefly re-enabling it and restarting Chrome immediately brought back the jitters. I'll just leave it disabled and chalk it up to a Chrome+nVidia interaction problem.