<hroth>
I can compile a kernel and install it (thanks!) but I'm having EDID issues: "mxc_hdmi mxc_hdmi: No modes read from edid". Is there anything you might suggest - can this be done through u-boot, or with a kernel option? I did read a workaround by hardcoding board_mx6q_hdmidongle.c but would prefer to be able to use other monitors.
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<hste>
jas-hacks_: trying the rootfs now
<jas-hacks_>
hste: ok
<hste>
jas-hacks_: looks fine so far. still have to do the dbus fix
<jas-hacks_>
hste: thats a pain
<jas-hacks_>
hste: I compiled with kernel a few tweaks so hopefully performs better, also the kernel includes the latest temp patch.
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<manos>
hi ,i have gk802 there is a new img for ubuntu 12.04 ?i have one ubuntu 11.10 but i dont have sound
<hste>
jas-hacks_: U could also rize CONFIG_LOG_BUF_SHIFT=16 so we gott all the boot into dmesg
<Guest902>
manos same here, no sound, manos probably your monitor is not been identified correctly
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<hste>
jas-hacks_: extract the files into /usr ?
<manos>
thanks 902
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<hroth>
I did compile the i2c debug kernel modules and confirmed an "error -5" on the i2c reading of the EDID eprom. I did get hdmi audio to be detected. Would have tested that audio except I got foolishly brave and tried to install the new u-boot (to replace the one (blob?) used in the cnx-software/jas-hacks 11.10/12.04 posts) at git://github.com/imx6-dongle/uboot-imx6dongle and everything hung. Back to the serial port, and possibly a
<hp__>
hroth: cool, so due to an error reading the EDID eprom that audio part is not initialized
<hroth>
hp__: it could be, and I suspect due to many folks having an issue with EDID there's something strange there.
<hroth>
(rather than a lot of bad monitor EDID EEPROMs)
<jas-hacks_>
hroth: is EDID failing in the kernel or uboot?
<hste>
jas-hacks_: got xbmc up :)
<jas-hacks_>
hste: it will probably crash due to overheating
<jas-hacks_>
hste: in /root/.xbmc ... there is an advancesettings.xml you need to copy that one (its sets dirty regions to reduce cpu load)
<jas-hacks_>
hroth: how are you connecting to monitor ? (hdmi, vga converter, dvi)
<hroth>
jas-hacks: hdmi.
<hroth>
my next step (once I figure out how to install the uboot-imx6dongle) is to use my Bus Pirate and see if it has better luck on the i2c bus for reading 0x50/EDID info. I wonder if there is a missing pull-down somewhere.
<jas-hacks_>
hroth: I have a compiled uboot (from uboot-imx6dongle) but with the hdmi detection disabled, if that will help you
<hroth>
jas-hacks: That'd be great. Quick question- Is the reason the uboot that is posted on your blog with the 12.04 preview (the uboot that boots the kernel from a dd at 1048576) - because that uboot is more stable? Is the compiled uboot pretty stable too?
<hste>
I got sound when setting video parameter. When not set I dont get sound
<hroth>
hste: That's setting the video parameter through uboot/setenv?
<hste>
hroth: yes
<hroth>
hste: Thanks.
<hste>
when not set it autodetects till mode "2048x1152-60"
<hste>
which is the monitors prefered output. It is connected with hdmi
<hroth>
hste: Interesting. I'm not so familiar with uboot so I kept trying to figure out why the (non-compiled) uboot wouldn't catch my bootcmd script... finally figured out there are two different uboots out there! duh.
<hste>
hroth: but u need to use boot.scr on / on that one
<manos>
anyone tried to put emmc in a gk802?
<hroth>
hste: even when it autodetects - do you ever have a dmesg about edid not being able to be read?
<hroth>
hste: Thanks! I will try that.
<jas-hacks_>
hroth: The uboots are pretty stable, the only issue with the latest code base is that it tries to detect the resolution in order to display a console. Unfortunately it doesn't detect correctly , so defaults to 1024x968 with the wrong pixel density. Which means the edges of the screen cut off.
<hste>
hroth: it also uses the kernel /boot/uImage
<jas-hacks_>
manos: how can you put emmc on a gk802?
<hroth>
jas-hacks_: Great. Is hste's u-boot_multi_boot the same compiled uboot you mentioned above? I'm willing to try all the uboots that are out there.. :)
<manos>
well i will try i have a eemc toshiba with convert to sd card from my fried odroid-x2 i will put it in my gk with hetasinkers just to test and if it works i put all in a new box
<jas-hacks_>
hste: uploaded viv_samples.tar.gz, these are the vivante gpu samples, it gives you a taste of how fast/good/bad the gpu should be.
<hroth>
hste: Great, thanks. So no more dd'ing uImage to 1048576, it will be nice to put it into /boot/uImage.
<manos>
since emmc is 200% faster if it works lose some from the converttions still mk will eat my dust
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<jas-hacks_>
hroth: Yes its the same multi-boot code
<hste>
hroth: and u can use external sdcard or usb if u want to have the rootfs there.
<hste>
hroth: just need to have the uboot on the internal sdcard
<hroth>
hste: Beautiful. I was starting to worry I might lose those tiny screws if I keep opening and closing that case!
<jas-hacks_>
manos: eemc will still be limited by mmc speed
<hste>
hroth: I have lost the antenna wires on mine, but wifi is working better for me without the wires.....
<hroth>
hste: I read old irc-logs where you said that - RF was always black magic for me.
<jas-hacks_>
manos: :) waiting for the results
<hroth>
manos: me too!
<rz2k>
<jas-hacks_> manos: eemc will still be limited by mmc speed - iirc if you connect it right (16 or 8bit bus) and configure the slot correctly, imx6 should handle emmc v4.4
<rz2k>
without speedcap
<hp__>
hste but you can only set video parameter in uboot
<hp__>
ah
<hp__>
no matter :) hste already mentioned
<hste>
hp__: I set them in boot.scr
<manos>
just make a good ubuntu 12.04 for me cause i like my gk but compare to exynos is way behind
<hste>
hp__: if u have boot.scr on internal it will be used and not one in ext sd
<hp__>
hste only working with internal only these days :)
<jas-hacks_>
manos: exynos looks better apart from alot of the ubuntu/debian code base still uses Open GL not GLES
<hste>
jas-hacks_: I think the new image u have made should be ready for publishing
<manos>
exynos have mali400 i think that is the difference cg2000 is not that fast or they dont know the gpu that good
<jas-hacks_>
hste: what resolution are you running at?
<rz2k>
mali400 can do 350fps when not tied with X11 in glmark2-es2 :p
<hste>
jas-hacks_: now I just use autodetect 2048x1152
<manos>
i want to have ubuntu desktop experience and so far i am not athat happy with gk ,exynos 4412 in the other hand was amazing but i fried him :P
<rz2k>
manos: you are in ARM world, anything from x86 world doesnt work here. use lightweight stuff, like xfce, lxde, openbox.
<hroth>
hste: Installing the u-boot_multi_boot.imx is the same on the internal SD, right: "dd if=u-boot_multi_boot.imx of=/dev/mmcblk0 bs=1K seek=1"?
<hste>
hroth: yes
<jas-hacks_>
hste: can you test one of the vivante samples "viv_samples/vdk/tutorial7" , see what fps you are getting at the resolution
<jas-hacks_>
rz2k: the problem is that a lot of stuff on xfce or lxde for ARM still uses Open GL
<hroth>
jas-hacks_: Your u-boot_multi_boot.imx was compiled from the latest version on git://github.com/imx6-dongle/uboot-imx6dongle? I just wanted to delve into the documentation/source to see other setenv options, etc.
<rz2k>
lets trash mesa-gl and there will be no oGL to use!
<rz2k>
:p
<manos>
dont take me wrong i am mint guy not ubuntu but compare ex4412+mali400 and i.mx6+cg2000 in ubuntu exynos run smooth and faster
<jas-hacks_>
hroth: It was compiled from that tree but last commit was from Mar 31, 2013
<hste>
jas-hacks_: ok. I'll download the sample and try
<jas-hacks_>
hroth: After that I add the multi-boot changes
<rz2k>
manos: yeah, freescale just uses 11.10 ubuntu with ton of patches and compiles everything to armel. exynos has linaro latest with amrhf
<rz2k>
armhf*
<rz2k>
i believe this matters a lot for user experience
<hste>
jas-hacks_: 128 fps
<jas-hacks_>
hste: I guess you couldn't check CPU load?
<jas-hacks_>
hste: do CPU get really hot?
<hste>
jas-hacks_: the test about 11% xorg about 7%
<hste>
jas-hacks_: not extreme hot and no temp warning
<hste>
jas-hacks_: but I have a heatsink mounted on the cpu
<hroth>
Thanks for all your help, jas-hacks_ and hste! I'm off, good night/day.
<jas-hacks_>
hste: xbmc should have made it very hot without dirty region?
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<hste>
jas-hacks_: it used a lot of cpu, but no warning
<jas-hacks_>
hste: what type/size heatsink are you using?
<projectgus>
i don't actually have any time to help diagnose it now but will find some soon
<FergusL>
anybody tried things like PureData on the imx6 ?
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<abrasive>
projectgus: that's great!
<abrasive>
FergusL: it should run prtty well
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<abrasive>
projectgus: hit me up when you have some time to investigate
<abrasive>
i haven't got many leads...
<FergusL>
yes, I'd just like to have an idea of how far it could go
<abrasive>
is Pd multithreaded?
<abrasive>
if it is, that suggests it could be extremely powerful
<FergusL>
that's another question, I was told it can by multithreaded if you basically add a puredata patch inside another patch, which is a very common technique for puredata
<abrasive>
projectgus: i'm glad that we're so insane that functionality failing is considered helpful...
<abrasive>
so it has to be multiple nested patches to multithread? interesting.
<abrasive>
well, puredata's pretty powerful even on a crap computer
<FergusL>
yes, I've seen a few videos of it on a RPi
<abrasive>
if you wanted it for eg. an installation piece, then it's probably a very workable option
<FergusL>
no, it's more for an embedded sampler or synthesizer
<FergusL>
so that's more or less realtime, but that's achievable on "normal" computers
<abrasive>
should still be fine. getting the realtime side up might be some work
<abrasive>
i've definitely seen issues when the MMC is very heavily loaded
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<abrasive>
that's not a big load when using pd though, even as a sampler
<abrasive>
unless you're loading squillions of samples from disk
<FergusL>
that won't happen for me
<abrasive>
in that case, the only downside i can see is that it has no native SPDIF or analog audio out - only over HDMI
<abrasive>
but if you use a USB interface that's no big deal
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<hste>
jas-hacks_: running turturial7 on 720p I get about 400fps
<jas-hacks_>
hste: yep their demos seem to be dependent on resolutions, I could get about 300fps at 1280x1024
<jas-hacks_>
hste: at 1650x1080 it drops to 190fps
<jas-hacks_>
hste: : just looking at bluetooth, do remember which tty port is was
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<hste>
jas-hacks_: I think its ttymxc1
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<hroth>
Uh oh! I've loaded the multi-boot uboot and that seems to work great! I just can't get it to automatically go to the External SD (I just wiped and loaded the new xubuntu 12.04 image). I've got the Serial Console running... but haven't used uboot like this before. What are some commands to try on the serial console?
<hroth>
Ah... ext2ls mmc 1:1 / seems to be reassuring.
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<hroth>
Working fine now, tips for anyone else who forgets to put a /boot.scr in the SD root partition:
<hroth>
Prepend the bootcmd.txt with "mmc dev 1" then "mmc rescan" before ext2load'ing
<hroth>
I'm thinking this xubuntu-12.04 image has the cpu freq control off; I've already got heat problems. What is the kernel config module to turn that back on and slow me down?
<hroth>
(or it might be that I have the aluminum case off to access the serial port.)
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<abrasive>
hroth: you at least need the heat spreader pad on
<abrasive>
otherwise it will definitely throttle
<hroth>
Yep, have that and a few small copper heatsinks balanced on it..
<abrasive>
cpufreq actually makes little difference to the total heat coming out of the package, because the primary regulator is on board too and it's a LDO...
<abrasive>
does move it away from the cores though
<abrasive>
putting a real heatsink straight onto the chip with some heatsink compound might help you out. those spreader pads are pretty fragile.
<hroth>
abrasive: got it; I'll have to design a larger enclosure for the wee dongle so that I can mount a real heatsink.
<abrasive>
i find the case works just fine still - doesn't get hot (unless it panics)
<abrasive>
you could always look in sysfs to see how cpufreq is doing
<abrasive>
look for the governor selection file.
<hroth>
Thanks. How do you mount a real heatsink straight onto the chip with the aluminum case not getting in the way?
<abrasive>
i think you get one or the other, unless you're handy with a mill
<hroth>
:)
<hroth>
Got it.
<hroth>
Off to re-compile the kernel with i2c debug... just trying to figure out why my i2c cannot read the EDID.
<abrasive>
aha! you have it too?
<abrasive>
i don't suppose you happen to have an oscilloscope. or even a multimeter?
<hroth>
Yes, I have an oscilloscope - but was going to start with a Bus Pirate which talks i2c.
<hroth>
There may be a lot of corruption on the bus, though, so I'll take a look on the scope.
<abrasive>
it's probably a level translator issue
<abrasive>
i have a sneaking suspicion that some boards are a dodgy revision
<abrasive>
but that's just speculation for now.
<abrasive>
the SOT23 transistors near the HDMI connector are the level shifters for i2c, they have all the probe points you should need
<hroth>
Thanks, that's helpful.
<abrasive>
unless it's some silliness like the HDMI DDC return ground not being connected or something ;) the DDC gnd and +5 were fine on mine, though
<hroth>
Looks like I'll be checking everything from the ground and supply up...
<hroth>
What revision is your board?
<abrasive>
not sure. is it marked?
<hroth>
Mine says: RT-M500A_V2.4
<hroth>
Is dated 2013 01 03
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<abrasive>
RT-M500A_V1.2 2012-09-22
<abrasive>
maybe they changed i2c buses completely then
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<hroth>
I believe HDMI is on i2c bus 1 on V2.4, at least. That's where I see my timeouts.
<hroth>
I know it's pretty different from the Freescale design but there surely isn't much on the RT-M500 between the SOC and the HDMI connector.
<abrasive>
three BJTs and a few resistors.
<abrasive>
i can't imagine they broke it between my rev and yours though