[Intel-gfx] Display problems after upgrade to X v1.18.3

[Jim Abernathy]

On 08/23/2016 03:06 PM, Jim Abernathy wrote:
> On 08/23/2016 01:10 PM, David Weinehall wrote:
>> On Tue, Aug 23, 2016 at 11:40:53AM -0400, 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 14.04.4 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.
>> Core i5 is a bit vague; to know what graphics generation you run,
>> could you provide the output of:
>>
>> sudo cat /sys/kernel/debug/dri/0/i915_capabilities
> gen: 6
> pch: 2
> is_mobile: yes
> is_i85x: no
> is_i915g: no
> is_i945gm: no
> is_g33: no
> need_gfx_hws: yes
> is_g4x: no
> is_pineview: no
> is_broadwater: no
> is_crestline: no
> is_ivybridge: no
> is_valleyview: no
> is_haswell: no
> is_skylake: no
> is_preliminary: no
> has_fbc: yes
> has_pipe_cxsr: no
> has_hotplug: yes
> cursor_needs_physical: no
> has_overlay: no
> overlay_needs_physical: no
> supports_tv: no
> has_llc: yes
> has_ddi: no
> has_fpga_dbg: no
> jim at test:~$
>
>> Also, since it might be a kernel issue, the kernel version would be
>> nice to know too (uname -a).
>>
> Linux test 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 
> 2016 x86_64 x86_64 x86_64 GNU/Linux
>
> Intel Desktop DCP847SKE NUC with Intel Celeron CPU 847 @ 1.10GHZ
>
To explain the differences between my OP about Core i5 and tests on 
Celeron.  My production PC with the problem is a Core i5, buy I took it 
back to Ubuntu 14.04 LTS until this is resolved.  I setup a Celeron NUC 
to use to help solve this issue.  Since All my PCs have Intel GFX and 
all have this problem using the Sony TV and Onkyo receiver on 16.04, the 
NUC was the easiest to setup and leave alone until the problem is resolved.

Jim A

>>> 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 amouts 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.
>> Kind regards, David Weinehall
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx