<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [BSW] External HDMI monitor suddenly shows solid color when playing Youtube video at 1080p [fifo underrun]" href="https://bugs.freedesktop.org/show_bug.cgi?id=97965#c53">Comment # 53</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [BSW] External HDMI monitor suddenly shows solid color when playing Youtube video at 1080p [fifo underrun]" href="https://bugs.freedesktop.org/show_bug.cgi?id=97965">bug 97965</a> from <a class="email" href="mailto:ykku16dev2@gmail.com" title="Yu Kang Ku <ykku16dev2@gmail.com>"> Yu Kang Ku</a> <pre>(In reply to Ville Syrjala from <a href="show_bug.cgi?id=97965#c52">comment #52</a>) > BALIMIT0 0xb > BALIMIT1 0xc > BALIMIT2 0xd > BALIMIT3 0xe > for each agent > [5:0] limit if some sort > [7:6] reserved I was able to make the problem go away by configuring the following registers: BALIMIT0 = 0x1f1f1f1f BALIMIT1 = 0x1f1f1f1f BALIMIT2 = 0x1f1f1f1f BALIMIT3 = 0x1f1f1f1f The original values for these registers are: BALIMIT0 = 0x1f3f3f3f BALIMIT1 = 0x3f3f3f3f BALIMIT2 = 0x3f3f3f3f BALIMIT3 = 0x3f3f3f3f > > There are 16 agents possible it seems (agent0 to agent15). I get the > impression that display is agent3, but there was one note somewhere > about display possibly being agent2. But by default agent2 is not isoc > whereas agent3 is, so that makes me think agent3 is more likely. Based on the original values of the above registers, I think you're right about the display being agent3. The register descriptions mention specifically that the display needs to use a lower value. Overall, this experiment seems to suggest that our problem is related to bandwidth rather than C-state latency. What do you think?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>