Firefox slow after DU [Solved]

[towo]

So your system is indeed using modesetting. If you want to check, if this is the culprint, you can make an


/etc/X11/xorg.conf.d/20-intel.conf which contains

Code Auswählen Erweitern



Section "Device"
Identifier "My GPU"
Driver "intel"
EndSection



Then restart X and look, if the issue is gone.

[piper]

If towo's advise don't work for you, can you please use paste and paste the output of

Code Auswählen Erweitern

about:support

use the

Code Auswählen Erweitern

copy text to clipboard

and paste it all


my basics

Code Auswählen Erweitern

Application Basics
------------------

Name: Firefox
Version: 50.0a1
Build ID: 20160724030208
Update Channel: nightly
User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0
OS: Linux 4.6.4-towo.1-siduction-amd64
Multiprocess Windows: 0/1 (Disabled)
Safe Mode: false

[Miho]

towo's advise works for me - thx!

[finotti]

It seems to work for me too, but I can't test it very well now.  I will do it this weekend and mark it as solved if it is indeed.

[finotti]

Indeed, problem solved!  Thanks towo and all for the great support!

[buhtz]

So your system is indeed using modesetting. If you want to check, if this is the culprint, you can make an

/etc/X11/xorg.conf.d/20-intel.conf which contains

Code Auswählen Erweitern



Section "Device"
   Identifier "My GPU"
   Driver "intel"
EndSection


The issue is gone. Thank you very much!

But could you please explain your solution?

I understand that there is a different "mode" in X. There is no need (for me) to understand that in details.
But what I want to understand is why this simple text-file here (de)activate that mode.

Does this modify a setting int he Debians own (new) intel driver. Or does this totaly switch to the old intels-own driver?

btw:
Firefox use Gecko, right?
There are similar problems with WebKit, too. https://bugs.freedesktop.org/show_bug.cgi?id=85064

[finotti]

I think that the intel driver wasn't being loaded (see the output of inxi in the original post) before.  The config file simply told the system to us the intel drive.

But I could be wrong...

[musca]

yes, it is right.

formerly there has been a separate driver package xserver-xorg-video-modesetting.
Some time ago this driver has been integrated into the xserver-xorg-core package.

Now the automatic detection was changed so modesetting is used for intel devices.

~$ zless /usr/share/doc/xserver-xorg-core/NEWS.Debian.gz
xorg-server (2:1.18.3-2) unstable; urgency=medium

  X now defaults to using built-in modesetting video driver on Intel
  hardware which is "4th gen GMA" and newer, so roughly speaking on hardware
  from 2007 and up. If this triggers new bugs on your hw, please file them
  against the xserver.

  Continuing to use the -intel driver is possible by dropping the template
  xorg.conf to /etc/X11:

  # cp /usr/share/doc/xserver-xorg-video-intel/xorg.conf /etc/X11

 -- Timo Aaltonen <tj...on@debian.org>  Tue, 19 Jul 2016 04:28:05 +0300

There is an explanation on Timo's blog.

The mentioned the template should be included in the xserver-xorg-video-intel package - I can't find it.

greetings,
musca

[der_bud]

... should be included in the xserver-xorg-video-intel package - I can't find it. ...

Seems to be a funny bug. Here too, reinstalling xserver-xorg-video-intel does not create that template xorg.conf. But regarding  https://packages.debian.org/en/sid/amd64/xserver-xorg-video-intel/filelist it is in the file list. So I downloaded the *.deb file and opened it with an archive manager, there is '...data.tar.xz\data.tar\.\usr\share\doc\xserver-xorg-video-intel\xorg.conf', but it does not get installed.

[musca]

Hello der_bud,

siduction/fixes includes a package which doesn't provide the file. (cleanup needed?)
The debian package is installable with:

Code Auswählen Erweitern

apt-get install xserver-xorg-video-intel=2:2.99.917+git20160706-1

The original content is:

musca@sidbox:~$ cat /usr/share/doc/xserver-xorg-video-intel/xorg.conf
Section "Device"
    Identifier "Intel"
    Driver "intel"
#    Option "AccelMethod" "uxa"
EndSection

SNA (Sandybridge New Acceleration) is its default mode.
UXA (Universal Xcceleration Architecture) might be worth a try. Just uncomment the line.
Users can create this configuration file with:

Code Auswählen Erweitern

mkdir-p /etc/X11/xorg.conf.d \
&& echo -e "\nSection \"Device\"\n    Identifier \"Intel\"\n    Driver \"intel\"\n#    Option \"AccelMethod\" \"uxa\"\nEndSection" >> /etc/X11/xorg.conf.d/20-intel.conf

greetings
musca

[musca]

Hello der_bud,

cleanup is neccessary, because in April intel had tagged the driver in git as version 2.99.918 but withdrawn to 917 later.

If you experience any problems with the intel driver we suggest to purge and install the intel driver,

Code Auswählen Erweitern

apt update && apt purge xserver-xorg-video-intel && apt install xserver-xorg-video-intel

or just downgrade to the current version, e.g. :

Code Auswählen Erweitern

apt install xserver-xorg-video-intel=2:2.99.917+git20160706-1

greetings
musca