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Channel Master CM-7000 channel banner sticky  

post #1 of 10
Thread Starter 
My channel master CM-7000 has what appears to be a firmware bug that causes the channel banner to stay on the screen forever. Normally, after changing channels, this "short form" banner shows up and times out. However, after changing channels a bunch I find that occasionally it just stays on the screen until I eventually push the Info button to bring up the information (long form) banner and press again to dismiss it. When I do that, something buggy must be going on because when the information banner appears the video goes black (not the normal behavior). Then when I press the info button again, to dismiss it, the video comes back and the box behaves normally again.

Have any of you seen this sticky channel banner behavior?
post #2 of 10
Quote:
Originally Posted by TooLittleTimeZZZ View Post

My channel master CM-7000 has what appears to be a firmware bug that causes the channel banner to stay on the screen forever. Normally, after changing channels, this "short form" banner shows up and times out. However, after changing channels a bunch I find that occasionally it just stays on the screen until I eventually push the Info button to bring up the information (long form) banner and press again to dismiss it. When I do that, something buggy must be going on because when the information banner appears the video goes black (not the normal behavior). Then when I press the info button again, to dismiss it, the video comes back and the box behaves normally again.

Have any of you seen this sticky channel banner behavior?

Yes, I have a similar problem. But no blackout, just a sticky banner sometimes, cured with the info button.
post #3 of 10
Quote:
Originally Posted by MLM View Post

Yes, I have a similar problem. But no blackout, just a sticky banner sometimes, cured with the info button.

Same thing here, no blackout but occasionally need to push info to clear banner.
My Sony CRT does the same thing so I'm used to it. Now I've got 2 devices I have to worry about the banner not going away Gotta love it
post #4 of 10
I've had that same problem too at times...

Bob Diaz
post #5 of 10
I don't have an answer for why its happening, but I find the sticky banner occurs when changing channels in succession within two or three seconds. I found that if the up/down channel buttons on the remote are quickly pressed and then released (just enough to change channel) ,it happens less ,then if the buttons are held down longer.
post #6 of 10
Quote:
Originally Posted by TooLittleTimeZZZ View Post

My channel master CM-7000 has what appears to be a firmware bug that causes the channel banner to stay on the screen forever.

Hi there

You've written a good problem report. But there's no reason to start guessing the cause, i.e. a "firmware bug". You're encountering a problem, a bug. For all you know, it could be a hardware bug. (Yes, I'm a FW engineer, and I hate to read bug reports that guess at the cause instead of just reporting symptoms, effective workarounds and other observations.)

Regards
post #7 of 10
Thread Starter 
OK then, how about a broadcaster induced, HDTV format related, HDMI 1.3, low-VHF antenna interference, signal strength related, too-small wire guage induced, foreign manufacturing quality, marketing problem? Let me know if I've missed the opportunity to offend everyone equally.

Quote:
Originally Posted by blue_z View Post

Hi there

You've written a good problem report. But there's no reason to start guessing the cause, i.e. a "firmware bug". You're encountering a problem, a bug. For all you know, it could be a hardware bug. (Yes, I'm a FW engineer, and I hate to read bug reports that guess at the cause instead of just reporting symptoms, effective workarounds and other observations.)

Regards
post #8 of 10
Quote:
Originally Posted by blue_z View Post

Hi there

You've written a good problem report. But there's no reason to start guessing the cause, i.e. a "firmware bug". You're encountering a problem, a bug. For all you know, it could be a hardware bug. (Yes, I'm a FW engineer, and I hate to read bug reports that guess at the cause instead of just reporting symptoms, effective workarounds and other observations.)

Regards

FWIW (as a former software developer and tech writer), IMO it *is* a "software bug" for the software (including firmware, which is just software "carved in stone") to not trap/deal with hardware issues. (I don't limit this philosophy to hardware issues -- I extend it to all venues, most particularly *user* "issues" -- i.e., the software should be sufficiently bulletproof to ensure that inadventent keystrokes won't crash it.)

As to the case at hand, the classic example is the old TRS-80 kkey bbounce problem (eventually fixed by an OS upgrade (and with later models, I presume a firmware patch), initially addressed by a small driver loaded via cassette tape). It drove pretty much all users batty until they finally came out with the tiny pile of code to filter out the keybounces -- which *should* have been included in the firmware.

Yes, it was a "hardware problem" but it was equally a firmware problem (no way were they going to reengineer the entire machine to use bounceless keyswitches -- if such a thing existed; the firmware author(s) were presented with a machine that needed bootstrap/BIOS firmware, including a keyboard driver (the keyboard was scanned/mapped from the main address space -- a keyboard driver was integral to the system, and probably a bit of a PITA to code; including a debounce routine that would be evoked in the middle of what had to be an ugly kludge of an address scanner, in a non-multitasking environment, on a 1.77 MHz 8 bit computer... glad it wasn't me! )

Anyway, having hardware that includes misfeatures that are NOT compensated for by the firmware... is a firmware bug, IMO. The firmware developer(s) are hired to come up with code to turn the hardware into a usable product. Hardware always has "issues" and the software is the last line of defense, standing between the user and the iron.

Edited to add that I had NO connection with the TRS-80, other than as a *very* early adopter some thirty odd years ago. I don't want anyone to think I was involved with that project, since I wasn't!
post #9 of 10
Agreed. The software (firmware) turns off the banner base on a timer. If the hw timer failed, a lot of things will fail. So 99.99% firmware bug.

The timer bug is actually very severe for people who plan on controlling the CM-7000 with TiVo, since TiVo has no idea its banner is stuck. Let's hope the issue is only related to Ch+/Ch-.
post #10 of 10
Please discuss this in the main CM 7000 topic.
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