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--- dri [2015/04/22 16:45]
+++ dri [2022/04/16 12:22] (current)
@@ Line 1: / Line 1: @@
+  * http://events.linuxfoundation.org/sites/events/files/slides/brezillon-drm-kms.pdf
+==== Direct Rendering Infrastructure @ http://dri.sf.net ====
+[[Debian]] : http://dri.freedesktop.org/wiki/Download http://www.nixnuts.net/files/README.txt
+==== S3TC / Compressed textures : ====
+http://homepage.hispeed.ch/rscheidegger/dri_experimental/s3tc_index.html
+http://www.digit-life.com/articles/reviews3tcfxt1/
+wget http://homepage.hispeed.ch/rscheidegger/dri_experimental/libtxc_dxtn050819.tar.gz
+  ed2k://|file|libtxc_dxtn050819.tar.gz|9950|c71a8a8cb775ea9cb774193ad90d557b|
+cat << EOF >> /etc/apt/sources.list
+  #{ [[3D]] : sudo apt-get install libtxc-dxtn
+   deb http://emeitner.f2o.org/debian/ ./
+   deb-src http://emeitner.f2o.org/debian/ ./
+  #} http://rzr.online.fr/q/DRI
+EOF
+=== Compile DRI @ http://dri.freedesktop.org/wiki/Download===
+  mkdir -p /usr/local/src/tmp/dri
+  cd /usr/local/src/tmp/dri
+  cvs -z3 -d:pserver:anonymous@dri.freedesktop.org:/cvs/dri login && \
+  cvs -z3 -d:pserver:anonymous@dri.freedesktop.org:/cvs/dri co drm
+  cd drm && ./autogen.sh
+=== Errors / DRI on [[AmiloA]]'s [[Radeon]] [[IGP 320M]] with [[Kernel]] 2.6===
+Supports DRI but conflicts on [[IRQ]]s see [[DSDT]].
+dri module works along [[xorg]] 6.8.1 on [[Radeon]] [[IGP 320M]] ... (at last =========)=========
+But, on my [[AmiloA]] there are still [[IRQ]] problems.
+When I start [[XWindow]] with dri, there's a system freeze (I didn't try to reach my computer via [[SSH]], though).
+I order to manage to start X, I need to unactivate some modules that use [[IRQ]] #11.
+For information, here is my default IRQ after system start :
+  cat /proc/interrupts
+           [[CPU]]0
+:   11814031          XT-PIC  timer
+:      37033          XT-PIC  i8042
+:          0          XT-PIC  cascade
+:          2          XT-PIC  ohci1394
+:          0          XT-PIC  acpi
+:          0          XT-PIC  ohci_hcd
+:      84447          XT-PIC  ohci_hcd, yenta, yenta, eth0, ALI 5451
+:     281295          XT-PIC  i8042
+:     110926          XT-PIC  ide0
+:     123694          XT-PIC  ide1
+[[IRQ]] #11 is quite crowded ======
+But I managed to start X without freeze after a reboot without sound modules being "modprobed" :
+           CPU0
+:   11814031          XT-PIC  timer
+:      37033          XT-PIC  i8042
+:          0          XT-PIC  cascade
+:          2          XT-PIC  ohci1394
+:          0          XT-PIC  acpi
+:          0          XT-PIC  ohci_hcd
+:      84447          XT-PIC  ohci_hcd, yenta, yenta, eth0
+:     281295          XT-PIC  i8042
+:     110926          XT-PIC  ide0
+:     123694          XT-PIC  ide1
+This way, X starts with dri activated, and it works ======
+But when X starts, I get the following kernel message : Disactivating irq #11, and then eth0 no longer works. No enemy-territory playing on the net for me yet ======
+As [[IRQ]] #11 gets disactivated, I believe that one or two of the usb ports no longer work (I didn't check), and that [[PCMCIA]] doesn't work neither (I don't have PCMCIA cards).
+And no sound, since I disactivated it myself...
+But [[3D]] acceleration works ======
+Some times later, I have managed to get also sound, booting with the "acpi_irq_balance" kernel option, which puts the ALI [[M5451]] module at IRQ #10 :
+           CPU0
+:   11814031          XT-PIC  timer
+:      37033          XT-PIC  i8042
+:          0          XT-PIC  cascade
+:          2          XT-PIC  ohci1394
+:          0          XT-PIC  acpi
+:          0          XT-PIC  ohci_hcd, ALI 5451
+:      84447          XT-PIC  ohci_hcd, yenta, yenta, eth0
+:     281295          XT-PIC  i8042
+:     110926          XT-PIC  ide0
+:     123694          XT-PIC  ide1
+I tried to recompile the radeon kernel module without IRQ sharing, but 3D applications segfault.
+I don't know X enough to be able to find how to solve the irq problem.
+I believe that DRI doesn't really need an [[IRQ]] in most cases, because after the "Disactivation irq #11" [[Kernel]] message, 3D acceleration still works ======
+=== Mistakes : libGL error: failed to open DRM: Operation not permitted===
+  glxinfo
+  # name of display: :0.0
+  # libGL error: failed to open DRM: Operation not permitted
+  # libGL error: reverting to (slow) indirect rendering
+  # display: :0  screen: 0
+  # direct rendering: No
+http://www.sh.nu/lgfaq/#drmperms
+  Section "DRI"
+      Mode     0666
+  EndSection
+-----------------------------------------------------------------------------
+  $ glxinfo
+  name of display: :0.0
+  libGL warning: 3D driver returned no fbconfigs.
+  libGL error: InitDriver failed
+  libGL error: reverting to (slow) indirect rendering
+  display: :0  screen: 0
+  direct rendering: No
+  * http://bugs.debian.org/318319
+=== error : radeon_dri.so  ===
+@tag: [[radeon_dri]]
+<html>
+LIBGL_DEBUG=debug glxinfo
+name of display: :0.0
+libGL error: dlopen /usr/lib/dri/radeon_dri.so failed (/usr/lib/dri/radeon_dri.so: cannot open shared object file: No such file or directory)
+libGL error: unable to load driver: radeon_dri.so
+display: :0  screen: 0
+direct rendering: No (If you want to find out why, try setting LIBGL_DEBUG=verbose)
+...
+</html>
+  aptitude install libgl1-mesa-dri
+worked for me on debian
+  * http://ubuntuforums.org/showthread.php?p=4153672#post4153672
+===== MORE =====
+@TaG: [[XWindow]] [[drm]] [[xserver-xfree86]] [[OpenGL]] [[3D]] [[xorg]] [[Stereo]] [[TvOut]] [[IGP]] [[GLX]]
+{{http://www.jolenestrailerpark.com.nyud.net:8090/YardDeco/geo9p15.png?nocache}}
+{{http://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Wayland_display_server_protocol.svg/819px-Wayland_display_server_protocol.svg.png}}
+__Underlined Text__