Thread: XM will not unmute after standby

Update - What is the MJS gadgets? I ran through the new RRConfig, and I see something for the MJS for radio. Do I need to change something here? Is there anything that I need to do different for XM than with the old RR?

I'll get debug files and post. I set RR to hibernate aware int he RRconfig program. Had it that way from the start.

My XM box is not the XMPCR, I think it is the XMD1000, but I will verify. I got it in early 2006 when I first started my carputer project. That is intersting about it not powering up muted. I put a set of PC amp/speaker direct on the XM box's output, and never got any audio, but I'm not sure that I cycled power on it. I will do that too.

Thanks for the help. This was particularly disappointing, as I was so very close to 100% functionality with the new PC, and I was very impressed with how things were working. The improvements in XM were obvious to me, after having it with the old version for a couple years.

I thought I was on to something. I was finally able to get the XM to unmute by completely powering down everything, disconnecting everything from the PC, then starting back up. I came to the realization that my PC is keeping power on the USB when in standby, and that was keeping the XM USB-RS-232 converter powered up, even though the XM box itself had no power. If I dropped power to everything, then brought PC out of standby, then started RR, XM would unmute and work great. I tested this by cycling into standby and back out a few times, pulling the USB once it was asleep, and ensuring the XM was powered off. It worked several times, but then finally went back to where it is stuck with XM muted, and nothing I am doing will get it unmuted right now. This is really wierd. Surely I'm missing something really simple here.


I have a general question: When RR is talking XM protocol to the XM box, specifically when selecting a new channel, is there a hand-shake, or is it one way? Reason I asked, is it seems strange that RR can change the XM channels, see the song updates, and everything appears to work normal, but the XM won't unmute. So I'm wondering if the channel change command to the XM is one way, and it just looks like it's working right, but it's not really? I know it sounds crazy, I'm just trying to understand more about how the XM serial protocol works. I can put an RS-232 protocol analyzer on the line and watch the exchange, but surely won't need to.

My XM is connected through a USB to RS-232 serial adapter and through a simple cable that converts the RS-232 from a DB9 connector to a little DIN connector that connects to the XM box. This is the exact same converter, cable and connections I have used for years with no problems.

I will be attaching the debug files in a moment.

My PC power and XM power are from the same source. They both are 12VDC, fed from a Carnetix P2140, from it's primary output. It's set to start on ignition, which sends ACPI to the PC's (laptops) power button, and brings it out of standby. So the XM gets power exactly when the PC does, and then in 2 seconds the ACPI signals the PC to wakeup. On shutdown, ignition triggers the shutdown sequence on the Carnetix P2140, which waits a few seconds, then sends ACPI to put the PC into sleep, which takes about 10 sconds, and then about 45 seconds later, the P2140 shuts down primary power to the PC and XM. However, the PC is keeping the USB lines powered during sleep, from it's own battery. This is what I thought was causing the problem earlier, but I'm not so sure now.

By the way, I do really appreciate the help.