display/GFX issue with Ubuntu 16.04 not seen in 14.04

Jim Abernathy jfabernathy at outlook.com
Tue Aug 23 10:53:13 UTC 2016

On 08/19/2016 10:17 AM, Jim Abernathy wrote:
> Not having much luck with the Distro forums on this issue so I thought 
> I'd ask for advice here.
> I've been running Ubuntu 14.04.5 for some time on Intel Core i5 GFX 
> without any issues.  My display is HDMI from the PC to an Onkyo A/V 
> receiver then to a Sony KDL-XBR6.
> When I try a fresh install of 16.04.1, I get a display that blanks out 
> for 3-5 seconds at random times depending on what is being displayed 
> at the time.  I also have small abouts of video noise that is random 
> horizontal lines about 1 pixel tall scattered through the page.
> I noticed that 14.04.05 uses X server 1.17.2 and 16.04.1 uses 1.18.3.
> When I do the command xrandr --verbose I see some small differences 
> between 14.04 and 16.04, but it's things like 2 digits displayed 
> instead of 1.  i.e. 60.0 vs. 60.00. I'm only concerned with 1080P HD.
> I've tried this on different computers all with Intel GFX. same results.
> This does not occur on other monitors or TVs.
> I'd blame it on Sony and Onkyo if they didn't work so well with 
> Windows, all versions, and ubuntu all versions except 16.04.
> It's almost like the auto detection software in the newest version of 
> X is off just enough to make my display flaky.  Kind of like the old 
> analog CRT TVs that were sensitive to small tweaks to the horizontal 
> and vertical adjustments.
> Any help would be appreciated.
> Jim A

Can someone let me know where I can ask questions regarding problems 
with X??  I thought this forum would be the place?

Jim A

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