Mplayer and multiptle simultaneous video streams through xv

While I was using nvidia drivers a while back, I could playback multiple simultaneous video streams through xv in mplayer without any problem. After recent change of video card and consequential move to open source radeon drivers, I've observed that I can play upmost one stream with gmplayer (it spits out an error about problems with opening the selected video out device - I can playback more files simultaneously using basic mplayer, although it spits the same error in console with every successive instance). Could someone enlighten me whether it's a standard behaviour of xv with radeon driver or maybe the problem lies elsewhere and it's omittable somehow?

Tried it, but to the same result
What I found out is that the user can play videos from console with framebuffer at least. Not that it helps..

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    To keep this thread as efficient and productive as possible for all those who it will be useful to: Unless you have in front of you1. A schematic of the Stream 8 USB port (USB port and battery power circuit etc)2. Source code of the BIOS firmware and kernel which control the hardware Please DO NOT reply simpy to say "this is not possible".  Given the above being true, you do not have enough info to say "not possible". If no one replys with a solution, let it be called impossible by default. Also please do not reply to say "I don't know how"  or "but I know how to do this other thing" thats also not so helpful. A BIOS update or other software update may be required by HP, Microsoft or both to make this really intuitive, and completely possible, functionality available. And hopefully this thread can be a consolidated effort by all of us who have the Stream 8 to bring any such necessary changes about.  A majority of other tablet PC are capable of this.  It seems that only the Stream 8 and a few others have trouble with it. ~~~~ I desire the ability to use a simple, perhaps standard, inexpensive cable (with minimal active electronics inside) that allows me to host and use one or more USB devices on the Stream 8 via its USB micro B port while this cable can also be connected to a standard charger and charge the Stream 8 simultaneously.  This means the cable has a minimum of three connectors.  One possible configuration is as follows (leaving the normal charge cable aside): 1. 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USB A Female - one or more connectors to plug in USB data stick, keyboard, mouse or even a hub. Connector # 2. above will provide power to charge the Stream 8 via conn. #1 and also supply power to the external USB device(s) via conn. #3 while they are in use - all simultaneously. A plus if the same cable can act as a normal OTG without a charger for when no external power is available.  Maybe this will require a switch or some active electrontics inside. The final part of this goal is kind of important for various reasons.  I would like HP, the maker of the Stream 8, to state in writing the correct mode necessary to do this so that other manufacturers or even do-it yourselfers can make maximal use of their HP tablet equipment. ~~~~ The neat thing this will alow a person to do with their tablet, is to work at home using the tablet like a desktop PC by connecting a keyboard, mouse, perhaps external display (with USB to display adapter) and work for a long time without being time limited by battery life because the charger supplies the power to everything involved. If there is only one #3 connector on the cable then an additional hub of coarse would be required to provide support for those multiple USB devices at once.  However it would be better if there were multiple of the #3 connectors built in to the cable itself.  This would be best because a proper USB hub also requires its own power.  Only one power adapter would be needed if the whole thing were integrated into one. ~~~~ I would really like replys from anyone who has already accomplished USB OTG plus simultaneous charging with the Stream 8. (independant of any published "correct" way is also welcome) The date today is 2015-01-16.  If by 2015-02-16 (one month) no one has posted a solution then lets start to bug HP and Microsoft about it shall we? ~~~~ Technical Background: I understand the possibility that the tablet software and or firmware needs to make a decision about which way power is flowing on the power pins of the USB mirco B port. I know that with proper design the electronic circuit carring these power signals inside the tablet could be sensitive to what is plugged in and safely decide for itself what to do without any need for software control.  For example by periodically testing/sensing voltage differentials or current direction to see which sides of the connector can supply power. But that is only one of many "could bes" Furthermore this may be non-standard with respect to the USB standard.  What appears to actually be the case with many OTG+Charge cables is that physical cues built into the cable or charger are used to signal to the tablet what the situation is.  Then the tablet's firmware/software recieves the signal, interprets what the situation is intelligently and responds by flipping the correct hardware control bits to turn on, or off power flow at the port and also control its direction in or out. I am not familiar with the USB standard.  Perhaps I could do more research, if I had faith that HP followed it with the Stream 8 or even that the standard covered this situation explicitly. But to a degree it seems like I am having to invent something that should intuitively just exist as it does with other tablets. 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A 1 K or 2 K seems pretty safe but then things are lower and lower current these days. . .   Anything but a dead short though if possible. So it seems possible to me that the device might be able to "identify" by the specific value of the resistor that is here.  In other words the resistor is not a pull down but actually an analog ID signature, in which case the exact value will be critical. So if this is the case, a guess isn't going to work. Obviously in any such scheme as described above, some chip inside the Stream 8 would need to be responsible for supporting such intelligence. I am hoping that the Stream 8 has such a chip. Likely a register inside that chip would reflect at all times what the state of the ID pin is with a binary number.  All that is needed is for the BIOS to address the chip and the register in it and read that number via the bus to determine what is going on at the port. 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In any case too complicated for the novice DIY for sure. The apparatus would need to act is some kind of bus extender.  Like an active hub.  But it would use the serial USB data lines handshake and in addition to replicating one or more additional USB ports, intelligently inform the tablet to get with the program which is "now we are going to otg and charge at the same time." This requires an intelligent external device with a CPU in it probably. It seems to me that many other tablets have managed accomplish the goal here witho the necessity for an intelligent external device and so the Stream should also be able to do so. There is a device which claims to be able to work with the HP Stream 7 and 8 and even provides ethernet and DVI ports in addition to the USB and of coarse charges the stream as well.  But its expensive because it is active.  Se here: http://amzn.com/B00OVDE0GC It is called a "Docking Station" A reference for a product that does exactly what I want (possibly without active electronics) is here: http://amzn.com/B00LTHBCNM It is by Kirin and it is a squid type device with four USB ports.  It does precisely what my objective is.  But reading in the reviews a Stream 7 user indicated that it would not OTG and charge, not exactly clear if it worked as an OTG USB hub or not.  Another reviewer indicated that it would not even support a single USB device much less charge on the Stream 8.  This device has a switch on it. I forgot to mention that some "hackers" have claimed to succeed with other tablets to trick their devices by using a multi step process to plug things in.  Usually in general they would get the tablet connected and charging first, then they would flip a switch or something removing whatever resistor or signal was presented by the first switch position. 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Then the data lines would be free and they would plug in a usb stick and it would mount up correctly even as the tablet was still charging. Its like the power circuit has a latch that will not allow it to flip to "power flow out" mode so long as it senses power is still flowing inward regardless of what software is telling it.  Complete guess here. Such tricks  seem iffy to me.  Changes in the BIOS could change the way this works.  Also you can't be sure what is really happening if you don't have a schematic.  You could damage your tablet.  A lot of people go by the charging icon indicated in the OS to know if the tablet is charging.  But I am a low risk kind of guy and my policy is generally to not intereperet indicators to have any meaning at all the once a device is operating in a non standard setting.  Especially when its something i didn't build and couldn't fix if I fry it. Hypothetical reasoning: tell me what sensory data actually drives the state of the on screen charging indicator?  Does it reflect the hardware control bit that actually programs the power direction and state on the port?  Or does it measure the direction of power flow, say in the battery supervisory section of the circuitry?  Point is - none of us have a schematic because it is proprietary. 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In the comments below the article a few people indicate that it charges, but slowly or remains at a steady power state. One of the commenters also provides a link to another similar OTG and Charge Device. Universal usb OTG Charger HUB cable for Tablet PC thinkpad 8,X98, M80ta,WT-8,Miix2,ME-400C,V8P,T100TA,W4-820,V975I,more models One commentor, Martinot states:     "I know others who got this one to work with HP Stream:" Then Martinot reposts the same thing but with a slight correction:       "I know some who got this one to work with HP Stream 7 and other Windows tablets:" So is it only Stream 7? or other Streams too? The charging "slowly" part kinda scares me.  It seems to indicate somethings not right.I don't want to fry my charging circuit and wind up having to RMA it.  Of coarse it could just be these people's perception as well.  Like watching grass grow.  I charged mine and it is normally kindof slow. 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Maybe it puts something on pin 4 the ID pin.  Really hard to say. Also difficult to get probes on that little Micro B male.  I need to get some push pins or something super tiny to probe those tiny pins. ~~~ Thanks for your post and thread reference leo_kendall.(Parallel Thread on This Forum: OTG, charging and extrenal batery pack works HP stream 7) leo_kendall says that it charges "slowly" using this method as well. Others in that thread report slow charging, but one said no charge at all . . . maybe did it wrong? Interesting that you need to disable the Microsoft ac adapter device driver. Also thank you to eriri-el, I actually saw that entire video even before I posted the first time. Remember that the video demonstrates this with a Toshiba something or other, not a Stream 8. One thing that is clear to me is that tablets all have unique behavior with respect to OTG plus charge. Still to address the idea, I think this may almost be electrically identical to  leo_kendall's method.  However it could be slightly different at the Micro B end because one begins life as an OTG cable.  The other is something different. I researched the Y cable at Startech.   3 ft USB Y Cable for External Hard Drive - Dual USB A to Micro B The purpose of the cable is to provide the ability to connect the USB Micro B end to a single power hungry client USB device - such as external hard drive.  The other two branches go to the PC in normal use. One provides the actual USB data connection with the standard 500 mA of power. The other (red one) provides an additional 500 mA of power from a second USB port.  The point is to provide double the power to an ext HDD.  There are no data wires in the red one. In the linked video, the cable is being completely repurposed.  Not that it's an invalid idea, you just have to be careful when trying to be smarter than the designers. Basically both methods place all three ends (Tablet, Charger, and USB Device) on the same common power bus.  That is, sharing the same +5V and Ground nets. How these two methods may differ has to do with that fishy ID pin (pin 4).  leo_kendall started with an OTG cable.  Whatever the OTG cable had on pin 4 before, I think it probably retained in his mod.  Be that a resistor to gnd pin 5, a short to ground pin 5 or whatever.  Its probably embedded in the molded plastic of the Mirco B connector which was not cut open or modified right?  Who knows what is on pin 4 until you get a DMM connected to some tiny push pins and measure pin 4 on that particular OTG cable.  Whatever is on there, It makes sense that it signals to the tablet "Hey, I'm an OTG cable, do OTG stuff."  In the tablet's sense of the world, I think "OTG stuff" doesn't  include charging.  Hence why leo_kendall had to disable the ac adapter device driver.  Intuitively, to me "OTG stuff" would mean put out power to the connected device not take in power.  But they say it works so . . . What this means is connect the Tablet's battery to a +5V voltage regulator with a 500 mA current limiter heading OUTwards on the port.  Voltage regulators and current limiters are usually one way things.  And trying to put power through them the wrong way should not work at all.  If it does its because additional circuitry was implemented to allow it. 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