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intel graphics factsheet

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musca:
Hello dear intel users,

let me give a general overview first:

* The last stable release 2.21 of the intel driver is 3 years old and debian jessie is the only distro still shipping it.
* The unreleased beta driver 2.99 is 1 ½ years old and git doesn't show much progress either.
* The current driver defaults to SNA, users of older chipsets may want to try UXA.As a result Debian and Ubuntu in xserver-xorg-core 2:1.18.3-2 have changed the autodetection to prefer the integrated modesetting driver over the intel driver, possibly causing performance degration.
[update:] Fedora 26/rawhide has integrated this patch from debian.

Now let me list some most recent issues with the intel beta driver:

* intel developers forgot to add pciids for latest intel GPUs. (fixed in libdrm 2.4.68)
* intel has tagged the beta driver as 2.99.918 in git but later withrawn the tag to 917. (Fix see below)
* linux kernel 4.6 enabled Frame-Buffer Compression (FBC) by default on Haswell and Broadwell GPUs.A nice thread which mangles all of theese details is Firefox slow after DU.

If you want to try the intel driver, please make sure you really have installed the latest.
If  'apt policy xserver-xorg-video-intel' seems suspicious (the .918 installed), you can do:
apt update ; apt purge xserver-xorg-video-intel ; apt install xserver-xorg-video-intel

greetings
musca

samoht:
Thank you so much for your support regarding the intel driver affairs  ;) .
Greetings
Tom

horo:
Hi,

Just checked my version:

--- Code: ---$ apt policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installiert:           2:2.99.918+git20160426-1
  Installationskandidat: 2:2.99.918+git20160426-1
  Versionstabelle:
 *** 2:2.99.918+git20160426-1 500
        500 http://ftp.spline.de/pub/siduction/fixes unstable/main amd64 Packages
        100 /var/lib/dpkg/status
     2:2.99.917+git20160706-1 500
        500 http://httpredir.debian.org/debian unstable/main amd64 Packages

--- End code ---
Executing

--- Code: ---apt update ; apt purge xserver-xorg-video-intel ; apt install xserver-xorg-video-intel

--- End code ---
changes the version to:

--- Code: ---$ apt policy xserver-xorg-video-intel
xserver-xorg-video-intel:
  Installiert:           2:2.99.917+git20160706-1
  Installationskandidat: 2:2.99.917+git20160706-1
  Versionstabelle:
 *** 2:2.99.917+git20160706-1 500
        500 http://httpredir.debian.org/debian unstable/main amd64 Packages
        100 /var/lib/dpkg/status

--- End code ---

I didn't run into problems in the past as I installed a /etc/X11/xorg.conf.d/20-intel.conf some time ago to enable the UXA mode:
http://forum.siduction.org/index.php?topic=6102.0

Ciao, Martin

musca:
Hello horo,
thanks for showing this example. It is exactly what I was talking about.

greetz musca

vilde:
This saved my siduction installation on an old x60. After d-u I was dropped in a blinking shell. Unable to write anything I couldn't log in to root. I manage to start in init 3 by edit in grub during boot, logged in to root and did : apt update ; apt purge xserver-xorg-video-intel ; apt install xserver-xorg-video-intel and now the old laptop is running again. Thanks :)

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