System stopped playing mp4 files on primary display but still works on secondary??

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Philbert

58 posts

Master Geek
+1 received by user: 3

#139300 3-Feb-2014 23:43

Hi,

Just upgraded my PC and have a ASUS H87 Mobo with Intel HD4600 IGPU as well as my original (and old) ATI RADEON PIC-e 4800 series GPU from about 6 years ago. Set up the system over the weekend with IGPU as my primary adaptor (because I needed the 3D input to the projector) and set up GPU as secondary to a second (extended) display.

Everything worked well last night but when I booted up today I could no longer play any mp4 or mkv files with either WMP12 or Nero Platinum14 MediaHome (both working last night) - there are other media players that I have (3D Video Player and an old version of Nero Showtime) that played the files fine.

When I disable the IGPU and use the discrete GPU all of media players work fine still (including WMP and Mediahome). This suggests to me that the issue is something to do with the Intel HD4600 drivers (rather than a Win7 codecs issue) but can't see why they were fine yesterday but not today - after the issues first appeared I checked on line and found a slightly newer driver which I downloaded but this made no difference.

I have emailed Intel but am not expecting much back from them - am sure they will tell me it is either a Win7 problem or an application problem.......

Any advice appreciated although I don't want to be told to install VLC etc - the fact is I like WMP and MediaHome and I they were working before they should work again!

Cheers,

Sam

Dairyxox

1595 posts

Uber Geek
+1 received by user: 455

#979973 4-Feb-2014 10:55

Do you use HDMI?
I've found that I need to sometimes reinstall the intel graphics driver to fix issues like this & missing sound. Don't know why it works one day then not the next.

Philbert

58 posts

Master Geek
+1 received by user: 3

#980270 4-Feb-2014 19:26

Yes - removing the discrete GPU 'fixes' things and I realise that this is probably the first thing I should have done but I had just finished screwing the case back together and burying the HTPC into the entertainment cabinet so was trying to avoid that if I could!

Am updating all graphics drivers I can find for both the removed GPU and the IGPU and will see what happens when I put it back in (possibly not tonight).....

Philbert

58 posts

Master Geek
+1 received by user: 3

#980862 5-Feb-2014 17:21

ok - so removed the RADEON HD4800 card and everything works fine.

Put it back in and everything goes belly up again. Also noticed that in addition to the media player issue other strange graphics things occurs e.g. trying to running Windows 7 Spider Solitaire gets an error message "no suitable graphics installed" and a few other programs open with 100% transparent windows i.e. I get the windows frame plus whatever program is running in the background rather than what is expected.

Removed HD4800 again and back to everything working - will try installed card but disabled in device manager as next option as despite disabling the installed card in BIOS it is still reported in device manager as installed and working.