<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - 【braswell】"*ERROR* cpu pipe A|B|C fifo underrun" - can not recovery" href="https://bugs.freedesktop.org/show_bug.cgi?id=103844#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - 【braswell】"*ERROR* cpu pipe A|B|C fifo underrun" - can not recovery" href="https://bugs.freedesktop.org/show_bug.cgi?id=103844">bug 103844</a> from <a class="email" href="mailto:wkcl00022@163.com" title="kait wang <wkcl00022@163.com>"> kait wang</a> <pre>hi Elizabeth: now we have made some progress in this problem. firstly, we increase the Pre-allocated/total GFX in bios setting to maximum and this problem was disappeared. secondly, the hrtimer is set in our config of kernel, which CONFIG_HIGH_RES_TIMERS and CONFIG_SCHED_HRTICK are set to yes. howerev, once we modify the config to disable the hrtimer, this underrun problem is disappeared. so we think the underrun problem is related to the access to gfx memory which could be effected by hrtimer. now we confused about the relationship between hrtimer and gpu. We really need your help and comments. expect for your reply again, thanks!</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> <li>You are the assignee for the bug.</li> </ul> </body> </html>