Looking at this post
Graphics and Compute Development on Samsung Chromebook « Mali Developer Center Mali Developer Center
I have see that is possible to have Mali GPU hardware acceleration on Samsung ARM Chromebook with Ubuntu.
On the post you guide all the process to prepare an sd card to install ubuntu with mail support on chromebook, could you provide even the imagefile of the generated sd card?
I appreciate this would be ideal, but unfortunately to provide a downloadable sd card image introduces various legal complications as we would be directly bundling open source components. By following the procedure on the link this is avoided. Do let us know though if you have any issues with the procedure... it has recently been improved so any feedback would be very welcome.
I tried the SD-card builder, and I was able to build Ubuntu images on SD cards that booted to 14.04 and 14.10, but either image fails to load acceleration. I always wind up with armsoc_dri.so turns up missing.
I made only minimal changes to the SD builder script so that it would boot -- on my x86_64 build host system, I only have mmcblk0 but the boot string for Chromebook had to point to a partition on mmcblk1... it boots, I copy over firmware from ChromeOS /lib/firmware, install wpasupplicant and wireless-tools by hand, then I am able to use the install-x11 script.
I can post more feedback later, I am not booted into the mali image now, just posting from ChromeOS. The mode of failure was pretty similar in 14.10, it doesn't seem like anything has changed, it just doesn't work for me. Not sure if I am missing kernel drivers or what.
Could you give some details about what you are trying? The guide has been thoroughly tested and so I'm surprised you are experiencing any issues. You shouldn't need to make any changes to the build scripts at all to build and run the SD image successfully.
Which chromebook device are you targeting? Which OS does your host system run, and which commands are you using to run the build script to generate the SD image for the chromebook?
Certainly, I can post all of that information.
The diffs I needed to get chromebook-setup.sh to be writing and booting the correct partition (card identified as mmcblk0 on my build laptop is mmcblk1 on my chromebook, so I changed the boot_params to reflect mmcblk1p2 would be the root device when booting from SD) are on this gist: Chromebook-setup Diff -- those changes also addressed that a USB drive that might have been "sdc" with partitions "sdc1, sdc2", as an SD card, would be mmcblk0p1 and mmcblk0p2 -- very minor changes I was surprised you didn't run into in your testing, too. This is enough to make the created image write out to a card and bootable. That all worked OK for me with only these minor tweaks to the script.
The chromebook I'm targeting is an XE303C12-A01US Samsung Chromebook original "Series 3", aka "Exynos 5250 - Snow" with the T604 Mali hardware.
The guide I'm using is from:
Graphics and Compute Development on Samsung Chromebook - Mali Developer Center Mali Developer Center
I invoke the build script as:
./chromebook-setup.sh --variant=XE303C12 --storage=/dev/mmcblk0 do_everything
I have in the current dir when I do the build, downloaded r4p1 GLES drivers archives according to the link on the page for mali-t60x:
The build also fetches:
I also get some git clones which I suppose are used for the build, in:
That all seems fine and when I have booted with the SD card in place and a Ctrl+U for "USB/SD external booting", I get dumped to a command line running from a root on the SD card, on a system with no wireless firmware (I needed to mount ChromeOS and copy over the firmware from /lib/firmware on mmcblk0p3) and no wireless support (so, I chroot in from the running ChromeOS and set up some DNS servers in /etc/resolv.conf, to do apt-get install wpasupplicant wireless-tools). Finally I can boot again with Ctrl+U and bring up the wireless interface independently, follow the steps to run as root the script ./install-x11.sh, it succeeds, I then do startx, and I note that the terminal who comes up moves very slowly if I try dragging it around the screen by picking up the title bar. This is my first hint that something is wrong.
At this point I noted the error messages issue mentioned about armsoc_dri.so in Xorg.0.log and I assume this means something is not set up correctly. Now I am out of my element unfortunately. Maybe I just need to configure Xorg to use a specific driver. A quick search: https://www.google.com/search?q=armsoc_dri.so+does+not+exist show that I may have gone somewhere I shouldn't be, although I think I haven't strayed from the garden path in the tutorial. I don't have the chromebook handy right now, only my build laptop which produced these images (Ubuntu 14.10 amd64), or I would post the exact error reported, but this should get pretty close.
Can I demonstrate somehow (lsmod? lspci? dmesg) that the kernel driver is really available for the Xorg driver's access? Should there be a node in /dev somewhere that I can probe somehow if this really worked?
I will post again later tonight with more details when I am in front of the Chromebook. Should I have a kernel of the same version as the Chromebook kernel (3.8.11?) I think I did get that, again not sure; I know I saw the build script compiling a kernel, but I'm not sure it downloaded the kernel drivers. They do seem to be already merged into the kernel git tree. Without the Chromebook in front of me right now, unfortunately this is the most detail I can provide; if you need anything else it will have to wait for later. I seem to have two patches applied over rev=1a6b9bf866357caafe68faabad56f60540841dc3
I appreciate your help!
The Xorg.0.log from startx just now:
The whole log is included above, but...
parts of that which caught my attention:
[ 18.346] (II) LoadModule: "armsoc"
[ 18.346] (II) Loading /usr/lib/xorg/modules/drivers/armsoc_drv.so
[ 18.352] (II) Module armsoc: vendor="X.Org Foundation"
[ 18.352] compiled for 1.15.1, module version = 0.6.0
[ 18.352] Module class: X.Org Video Driver
[ 18.352] ABI class: X.Org Video Driver, version 15.0
[ 18.352] (II) ARMSOC: Driver for ARM compatible chipsets: Mali-4XX, Mali-T6XX
[ 18.352] (--) using VT number 7
[ 18.357] (WW) Falling back to old probe method for armsoc
[ 18.357] (II) No BusID or DriverName specified - opening /dev/dri/card0
[ 18.357] (II) Got BusID platform:exynos-drm:00
[ 18.478] (II) Opened DRM
[ 18.479] (II) DeviceName is [/dev/dri/card0]
[ 18.479] (II) bus_id is [platform:exynos-drm:00]
[ 18.479] (II) DriverName is [exynos]
[ 18.479] (II) version is [1.0.0]
[ 18.710] (II) ARMSOC(0): [DRI2] Setup complete
[ 18.710] (II) ARMSOC(0): [DRI2] DRI driver: armsoc
[ 18.710] (==) ARMSOC(0): Backing store enabled
[ 18.710] (==) ARMSOC(0): Silken mouse enabled
[ 18.713] (II) ARMSOC(0): HW cursor init()
[ 18.714] (EE) ARMSOC(0): ERROR: Failed driver-specific cursor initialization
[ 18.735] (EE) AIGLX error: dlopen of /usr/lib/arm-linux-gnueabihf/dri/armsoc_dri.so failed (/usr/lib/arm-linux-gnueabihf/dri/armsoc_dri.so: cannot open shared object file: No such file or directory)
[ 18.735] (EE) AIGLX: reverting to software rendering
[ 18.852] (II) AIGLX: Loaded and initialized swrast
Are these indications that I've loaded the wrong driver, or normal messages?
What can I do, if you do happen to recognize the problem
I found this thread: Bug #1085596 “Graphics acceleration not working in ubuntu deskto...” : Bugs : Cross distro support for Samsung Chromeboo…
Seems to be tackling a similar issue. I followed and read down to the point where they suggested that GLX was not supported and should be disabled, like:
I generated an xorg.conf with Xorg -configure and copied it over the minimal xorg.conf in /etc/Xorg to put this section in.
This takes care of my "(EE) AIGLX error: dlopen of /usr/lib/arm-linux-gnueabihf/dri/armsoc_dri.so failed (/usr/lib/arm-linux-gnueabihf/dri/armsoc_dri.so: cannot open shared object file: No such file or directory)", but does not seem to have fixed anything else.
Then I tried for kicks, change the driver from "armsoc" to "exynos" -- bazinga!
Suddenly es2gears and friends can spring to life with decent framerates. Turning back on Load "glx" in the xorg.conf gives even better performance for small windows at least with glxgears, I render over 130fps in the default size glxgears. Making this change, to read the Xorg.0.log seems to indicate that I've reverted to software rendering with (EE) AIGLX: reverting to software rendering, and es2gears gives this output before it starts rendering to the small window at 70fps:
libEGL warning: DRI2: failed to authenticate
EGL_VERSION = 1.4 (DRI2)
vertex shader info:
fragment shader info:
... maybe this has something to do with the fact that I'm running with root, but I've disabled glx for now. Actually, now that I check, I get that error from es2_info as well as es2_gears, regardless of whether glx is enabled or disabled. And es2_info shows I'm using mesa with software rasterizer in every case. glmark2-es2 won't render any frames.
So, I think I'm closer, but still doing something wrong! Any ideas?
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