<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [CI][KBL only] igt@* - dmesg-warn - *ERROR* CPU pipe [A|B] FIFO underrun" href="https://bugs.freedesktop.org/show_bug.cgi?id=105604#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [CI][KBL only] igt@* - dmesg-warn - *ERROR* CPU pipe [A|B] FIFO underrun" href="https://bugs.freedesktop.org/show_bug.cgi?id=105604">bug 105604</a> from <a class="email" href="mailto:marijan.matic@zg.t-com.hr" title="Marijan <marijan.matic@zg.t-com.hr>"> Marijan</a> <pre> Running on Fedora 30, Kernel 5.2.9, HP Elitebook 840 G5, Using 2 external monitors on DP (tried also 1xVGA + 1DP, same issue). Same issue on Ubuntu 18.04. Result - PC Hangs, hw reboot required. Here are the logs of last moments: Jul 31 15:13:03 localhost.localdomain kernel: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun Jul 31 15:13:03 localhost.localdomain kernel: [drm:intel_mst_enable_dp [i915]] *ERROR* Timed out waiting for ACT sent Jul 31 15:13:03 localhost.localdomain kernel: [drm:pipe_config_err [i915]] *ERROR* mismatch in pixel_rate (expected 148500, found 296999) Jul 31 15:13:03 localhost.localdomain kernel: [drm:pipe_config_err [i915]] *ERROR* mismatch in shared_dpll (expected 000000001275aaee, found 000000004520f932) Jul 31 15:13:03 localhost.localdomain kernel: [drm:pipe_config_err [i915]] *ERROR* mismatch in dpll_hw_state.ctrl1 (expected 0x00000003, found 0x00000001) Jul 31 15:13:03 localhost.localdomain kernel: [drm:pipe_config_err [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 148500, found 296999) Jul 31 15:13:03 localhost.localdomain kernel: [drm:pipe_config_err [i915]] *ERROR* mismatch in port_clock (expected 270000, found 540000) [drm:intel_ddi_prepare_link_retrain [i915]] *ERROR* Timeout waiting for DDI BUF C idle bit Jul 31 15:13:18 localhost.localdomain kernel: [drm:intel_ddi_prepare_link_retrain [i915]] *ERROR* Timeout waiting for DDI BUF C idle bit [drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:83:pipe C] flip_done timed out Error appear/disappear more frequently after screen lock depending on kernel version.</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>