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mesa VIDEO_CARDS intel and/or i915 with i915 latpop
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jeffk
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Joined: 13 Sep 2003
Posts: 656

PostPosted: Mon May 16, 2016 8:00 pm    Post subject: mesa VIDEO_CARDS intel and/or i915 with i915 latpop Reply with quote

I have a Thinkpad x220 ~amd64, and just noticed that I'm running with VIDEO_CARDS="intel" and not enabling i915. WebGL demos under google-chrome-unstable have been working well lately.

What is the difference between intel and i915 VIDEO_CARDS driver settings? Is one active and one legacy? Recommendations appreciated.
Code:
% grep VIDEO /etc/portage/make.conf
VIDEO_CARDS="intel"

% sudo lsmod |grep 915
i915                 1016878  6
drm_kms_helper        110450  1 i915
drm                   312888  5 i915,drm_kms_helper
intel_gtt              12714  1 i915
video                  29066  2 i915,thinkpad_acpi
backlight               8037  3 i915,video,thinkpad_acpi
button                  5667  1 i915
aes_x86_64              7915  0
i2c_algo_bit            5467  2 igb,i915
i2c_core               27020  6 drm,igb,i915,i2c_i801,drm_kms_helper,i2c_algo_bit

% sudo eselect mesa list
i915 (Intel 915, 945)
  [1]   classic
  [2]   gallium *
i965 (Intel GMA 965, G/Q3x, G/Q4x, HD)
  [1]   classic *
r300 (Radeon R300-R500)
r600 (Radeon R600-R700, Evergreen, Northern Islands)
sw (Software renderer)
  [1]   classic
  [2]   gallium *

% sudo emerge mesa --oneshot -pv
[ebuild   R    ] media-libs/mesa-11.2.2::gentoo  USE="classic dri3 egl gallium gbm gles2 llvm nptl udev xvmc -bindist -d3d9
-debug -gles1 -opencl -openmax -osmesa -pax_kernel -pic (-selinux) -vaapi -vdpau -wayland -xa" ABI_X86="(64) -32 (-x32)"
VIDEO_CARDS="intel (-freedreno) -i915 -i965 -ilo -nouveau -r100 -r200 -r300 -r600 -radeon -radeonsi (-vc4) -vmware" 0 KiB
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derk
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Joined: 10 Mar 2003
Posts: 347
Location: St Thomas Ontario

PostPosted: Mon May 16, 2016 8:56 pm    Post subject: Reply with quote

intel use flag allow both i915 and i965 x11 video drivers to be built .. and supported by mesa .. this is not the same as the i915 kernel module ..
the i915 x11 video mesa driver supports older chipsets
the i965 x11 mesa driver supports the newer chipsets

note: these also require xf86-video-intel to be built as well


.. see the gentoo wiki for details https://wiki.gentoo.org/wiki/Intel


the i915 kernel driver supports "all" intel chips sets .. currently provided by intel to the kernel driver sources

be aware that the newest intel chipsets appear to be getting a new kernel driver ..
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charles17
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Joined: 02 Mar 2008
Posts: 2613

PostPosted: Tue May 17, 2016 7:06 am    Post subject: Reply with quote

derk wrote:
the i915 x11 video mesa driver supports older chipsets
the i965 x11 mesa driver supports the newer chipsets

derk
How should the user know if a certain chipset is »newer« or »older«? I have always found that table given under https://wiki.gentoo.org/wiki/Intel#Feature_support being quite confusing.
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derk
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Joined: 10 Mar 2003
Posts: 347
Location: St Thomas Ontario

PostPosted: Tue May 17, 2016 10:29 am    Post subject: Reply with quote

the auto configure of xorg-server is very good these days .. and if you use the intel use flag ... the correct mesa module is selected during start-up ...check your /var/log/Xorg.0.log ..( or Xorg.*.log 's )


newer or older is "a relative term" .. in the wiki as you go down the main table the "technology is newer" .. more capabilities are added to the video card gpu chips
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