<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - HD7600 glitches with TV Tuner" href="https://bugs.freedesktop.org/show_bug.cgi?id=91303#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - HD7600 glitches with TV Tuner" href="https://bugs.freedesktop.org/show_bug.cgi?id=91303">bug 91303</a> from <a class="email" href="mailto:adf.lists@gmail.com" title="Andy Furniss <adf.lists@gmail.com>"> Andy Furniss</a> <pre>It could be USB, I recently started using a DC fanless, headless, intel baytrail board as my home router/pvr/nas box and it has a similar issue. Of course you issue may be quite different given fglrx seems to help - but then it may just manage to keep the cpu out of lower power states while working. I don't know tvtime at all - I assume you are watching digital TV, if so it would be really handy if it does/could log continuity counter errors. If you see those then they would explain the issue. I use tvheadend - it does log cc errors so I know that for me xhci usb is loosing the odd packet at a low but enough to be annoying level. I do have a thread on linux-usb and eventually may find something useful, but I found a 99% workaround anyway = don't use xhci! On my box I turned off USB3 in bios, which makes the kernel use the ehci driver which fixes my normal use cases but I can still provoke with extreme testing (2x 40mbit DVB-T2 muxes). If you are into doing your own Kernels some h/w will get xhci for usb3 ports and ehci for USB2 ports if you build just xhci as a module. Saying all that I don't know your hardware and it may all be irrelevant. Perhaps you could try some ways to see if the glitches are data loss related - See if tvtime can be made verbose to log continuity counter errors or log the output of the mpeg decoder. Maybe install tvheadend, record something and look in eg. /var/log/daemon.log for errors. Install mplayer or mpv, run from an xterm/console/whatever and watch TV - both by default will print the mpeg errors (if any) that result from missing data.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>