Intel graphics TearFree disabled despite xorg.conf

daanjderuiter · 2017-09-30 16:13:56

I run a setup with Bumblebee, and experience quite a lot of tearing in normal desktop use (using the Intel GPU), which I tried to fix using the TearFree option. However, after creating

~ % cat /etc/X11/xorg.conf.d/12-intel.conf 
Section "Device"
	Identifier 	"Intel Graphics"
	Driver 	"intel"
	Option "TearFree" "True"
EndSection

and rebooting, I get the following in Xorg.0.log:

[...]
[     4.195] (==) intel(0): TearFree disabled
[...]

Does anyone know what might be causing this behaviour?

Last edited by daanjderuiter (2017-10-01 13:13:31)

V1del · 2017-09-30 16:28:53

According to

man xorg.conf

boolean option values should be lowercase. https://wiki.archlinux.org/index.php/In … free_video also uses lowercase.

daanjderuiter · 2017-09-30 17:38:27

Changed it, but the option still gets disabled. I tried putting it both in /etc/bumblebee/xorg.conf.d and in /etc/X11/xorg.conf.d, with identical results.

V1del · 2017-09-30 19:28:57

How do you start X? can you post a full xorg log?

daanjderuiter · 2017-09-30 22:12:35

I start X using LightDM, here is my Xorg.0.log file. The other Xorg.#.logs have similar lines

seth · 2017-10-01 07:16:36

[     4.046] (**) intel(0): Option "Backlight" "intel_backlight"

Since this is not in your posted snippet, please paste all /etc/X11/xorg.conf.d/* (or check them yourselfs for a contender)

daanjderuiter · 2017-10-01 09:02:18

Apologies, here are all of the conf-files. Sorry for the inconsistent use of tabs and spaces, by the way

Last edited by daanjderuiter (2017-10-01 09:05:27)

seth · 2017-10-01 09:05:40

Try to add it to 11-backlight.conf and see what happens.

daanjderuiter · 2017-10-01 09:11:34

That did the trick, thanks! So, X doesn't like me giving different Identifiers to the same device in two different configs

daanjderuiter · 2017-10-01 13:13:05

Welp, it still is not quite sorted. TearFree is enabled but then disabled for some reason:

~ % grep -i Tear -H /var/log/Xorg.*.log      
/var/log/Xorg.0.log:[     4.115] (**) intel(0): Option "TearFree" "true"
/var/log/Xorg.0.log:[     4.116] (**) intel(0): TearFree enabled
/var/log/Xorg.1.log:[  8395.345] (**) intel(0): Option "TearFree" "true"
/var/log/Xorg.1.log:[  8395.346] (**) intel(0): TearFree enabled
/var/log/Xorg.2.log:[ 13185.115] (==) intel(0): TearFree disabled
/var/log/Xorg.3.log:[291080.180] (==) intel(0): TearFree disabled

Here are also my Xorg.2.log and Xorg.3.log, since that's where TearFree is reported to be disabled.

V1del · 2017-10-01 14:05:49

One of them is quite old, the other could be from a bumblebee invocation or similar, check with xrandr which xorg session is assigned to your adapter/card, which is usually 0 which means that it would be enabled.

seth · 2017-10-01 18:28:54

Actually both logs predate comment #8, so not much of a surprise here.

I'll take the opportunity to elaborate on the exisinting config files.
You're indeed right that you cannot have two Device IDs for the same piece of HW, resp. only one is used (and the backlight is first and even better (card0, though i'm not sure whether the intel driver cares) match .

Arch Linux

#1 2017-09-30 16:13:56

Intel graphics TearFree disabled despite xorg.conf

#2 2017-09-30 16:28:53

Re: Intel graphics TearFree disabled despite xorg.conf

#3 2017-09-30 17:38:27

Re: Intel graphics TearFree disabled despite xorg.conf

#4 2017-09-30 19:28:57

Re: Intel graphics TearFree disabled despite xorg.conf

#5 2017-09-30 22:12:35

Re: Intel graphics TearFree disabled despite xorg.conf

#6 2017-10-01 07:16:36

Re: Intel graphics TearFree disabled despite xorg.conf

#7 2017-10-01 09:02:18

Re: Intel graphics TearFree disabled despite xorg.conf

#8 2017-10-01 09:05:40

Re: Intel graphics TearFree disabled despite xorg.conf

#9 2017-10-01 09:11:34

Re: Intel graphics TearFree disabled despite xorg.conf

#10 2017-10-01 13:13:05

Re: Intel graphics TearFree disabled despite xorg.conf

#11 2017-10-01 14:05:49

Re: Intel graphics TearFree disabled despite xorg.conf

#12 2017-10-01 18:28:54

Re: Intel graphics TearFree disabled despite xorg.conf

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