Raspberry Pi Forums

AndyPi

I am using an up to date arch system. Th only mailbox.h I have is

/opt/vc/src/hello_pi/hello_fft/mailbox.h

.

ls -al /dev/vcio
crw------- 1 root root 249, 0 Jan 1 1970 /dev/vcio

I am thinking that because the constant IOCTL_MBOX_PROPERTY is constructed with ioctl identifier of 100

AndyPi

I may be going mad but...... When using mailbox to communicate to VC, we used to create a character device with major number 100. This changed with the introduction of /dev/vcio which has major number 249. In mailbox.h there is define IOCTL_MBOX_PROPERTY _IOWR(MAJOR_NUM, 0, char *) but it requires t...

AndyPi

If its version 7 then root login is prohibited by default. see http://lists.mindrot.org/pipermail/open ... 00122.html

If this is the case then you may need to edit sshd_config to
PermitRootLogin yes

AndyPi

Checkout https://www.raspberrypi.org/documentati ... uilding.md and https://wiki.archlinux.org/index.php/Ke ... raditional and inspect the PKGBUILD. It is possible for determined novice to succeed, but needs time.

AndyPi

Try http://www.hitex.co.uk and search for raspberry !

AndyPi

This seems to be linked to BTRFS file system being built in the kernel. The tests are as follows [ 1.314471] raid6: int32x1 gen() 91 MB/s [ 1.484632] raid6: int32x1 xor() 69 MB/s [ 1.654986] raid6: int32x2 gen() 118 MB/s [ 1.825093] raid6: int32x2 xor() 72 MB/s [ 1.995377] raid6: int32x4 gen() 112 M...

AndyPi

Try installing crda and amend the wireless regdom file

AndyPi

I noticed some boot messages in dmesg referring to raid 6 timings. and selecting algorithms. It seems to take about 2 seconds ie from about 1.3 to 3.19. It does 12 tests, each taking about 0.17secs. I dont even think I use raid on my raspberry pi. eg raid6: int32x4 xor() 76 MB/s Can this be avoided ?

AndyPi

Hi

see if you can access "OpenGLES 2.0 Programming Guide.pdf" by Aaftab Munshi, Dan Ginsburg, and Dave Shreiner. Its a good resource.

regards

Andy

AndyPi

have a look at https://wiki.archlinux.org/index.php/Resolv.conf

AndyPi

Thanks for that. I think Im going to have a go compliling mesa with vc4 support by taking the pkgbuild from https://github.com/archlinuxarm/PKGBUILDs/blob/master/extra/mesa and adding --with-gallium-drivers=vc4 and see how far I get. Sadly I lack any deep understanding of this stuff and just have to...

AndyPi

I was having a go at building the mesa driver being worked on by eric anholt following his instructions http://dri.freedesktop.org/wiki/VC4/ . They are oriented towards raspian but i am naively translating to arch. The building of mesa fails because it cant find libdrm_intel. I think it wants this b...

AndyPi

this any good ?

http://www.raspberrypi.org/documentatio ... uilding.md

AndyPi

I have 7811UTC and I had a lot of trouble with drivers and experimented with 2.4G and 5G bands. I finally got one direct from edimax support called which they called there latest rtl8811AU_linux_v4.3.7_11618.20141029 They are clear that they dont officially support it but with some minor patches it ...

AndyPi

This is interesting and recent
https://www.youtube.com/watch?feature=p ... XDeketJNdk

came from
http://phoronix.com/scan.php?page=news_ ... 3D-VC4-LCA

AndyPi

Isnt this the wrong way round. Original post has SRRR MMMM PPPP TTTT TTTT VVVV S scheme (0=old, 1=new) R RAM (0=256, 1=512, 2=1024) M manufacturer (0='SONY',1='EGOMAN',2='EMBEST',3='UNKNOWN',4='EMBEST') P processor (0=2835, 1=2836) T type (0='A', 1='B', 2='A+', 3='B+', 4='Pi 2 B', 5='Alpha', 6='Comp...

AndyPi

Ok, all is well. Blimey...the compile time on the old pi was best part of 20 minutes on pi2, using -j6, 2 minutes !

AndyPi

ktb wrote:@AndyPi

Did you install linux-raspberrypi-headers?

sudo pacman -S linux-raspberrypi-headers

yes, but as I say no bcm709 includes came with it (I think)

AndyPi

Furthermore barriers.h. I grabbed the folder from github and copied into mach-bcm2709 and all seems well. But I guess the includes should be installed with the linux headers

AndyPi

On the barriers.h file...I am a bit naive and learning as I go so bear with me. On git hub there is barriers.h file in linux/arch/arm/mach-bcm2709/include/mach/. However when I try to find it on my machine # find / -name mach /usr/share/terminfo/m/mach /usr/lib/modules/3.18.5-2-ARCH/build/arch/arm/m...

AndyPi

Trying to build a wifi driver (works on Pi1). ./arch/arm/include/asm/barrier.h:41:27: fatal error: mach/barriers.h: No such file or directory #include <mach/barriers.h> ^ compilation terminated. it looks for it if CONFIG_ARCH_HAS_BARRIERS is defined what to do ? Download PKGBUILD's Increment releas...

AndyPi

Trying to build a wifi driver (works on Pi1). ./arch/arm/include/asm/barrier.h:41:27: fatal error: mach/barriers.h: No such file or directory #include <mach/barriers.h> ^ compilation terminated. it looks for it if CONFIG_ARCH_HAS_BARRIERS is defined what to do ?

AndyPi

OK Ive fixed this. All to do with problems resolv.conf.

AndyPi

Im getting some error: failed to commit transaction (invalid or corrupted package (checksum)) on installing extra packages. e.g. iw After initial boot I installed wpa_supplicant and then rng_tools without problem. I usually dont do any of the pacman-key related stuff, is this a problem. I have tried...

AndyPi

Thanks for that update.

Search found 83 matches

Re: Linux kernel is now 4.1

Re: Linux kernel is now 4.1

Re: Connection via ssh, fresh install

Re: Raspberry pi b+ - compile arch linux kernel on ubuntu 14

Re: C/C++ Cross Development On PC

Re: raid 6 boot time

Re: reboot takes 16 minutes after update

raid 6 boot time

Re: Is there a maximum number of uniforms available in glsl?

Re: WiFi connection on Arch using static IP

Re: Mesa and DRM driver for VC4

Mesa and DRM driver for VC4

Re: where to find build recipe for kernel package

Re: ASUS USB-AC56 (RTL8812AU/RTL8821AU) Driver compile fails

Re: Video Core Source – 1 Year On

Re: Made in PRC

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2

Re: Arch on Pi2