<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - two external screens permanently go blank on HP EliteBook Folio G1" href="https://bugs.freedesktop.org/show_bug.cgi?id=108462#c29">Comment # 29</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - two external screens permanently go blank on HP EliteBook Folio G1" href="https://bugs.freedesktop.org/show_bug.cgi?id=108462">bug 108462</a> from <a class="email" href="mailto:karthik.b.s@intel.com" title="Karthik B S <karthik.b.s@intel.com>"> Karthik B S</a> <pre>Hi, Sorry for the delay in reply. I actually tried to reproduce the bug at our end multiple times, but have not been successful till now. Also I'm having some issue with the .dat file format, the file I have seems partially corrupted. A .txt file would suffice. I've narrowed the ftrace to 4 functions so that the buffer doesn't get overwritten. Could you please run the below steps. echo 0 > /sys/kernel/debug/tracing/tracing_on echo nop > /sys/kernel/debug/tracing/current_tracer echo "intel_atomic_commit" "intel_atomic_commit_tail" "intel_cpu_fifo_underrun_irq_handler" "gen8_de_irq_handler" > /sys/kernel/debug/tracing/set_ftrace_filter echo function > /sys/kernel/debug/tracing/current_tracer echo 0 > /sys/kernel/debug/tracing/events/enable echo 1 > /sys/kernel/debug/tracing/events/i915/i915_reg_rw/enable echo 1 > /sys/kernel/debug/tracing/tracing_on And once you've seen the flicker, dump the trace into a log file. cat /sys/kernel/debug/tracing/trace > trace.log</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>