Quoting Joel Fernandes (2018-10-27 09:14:07) > On Sat, Oct 27, 2018 at 12:38:56AM -0700, Joel Fernandes wrote: > > Hi! > > My Linux laptop running kernel v4.17 freezes intermittently when the laptop > > lid is closed but external monitors are connected to 2 HDMI ports. I provided > > details on the issue, any idea what could be causing it? > > > > I ruled out many different subsystems by trial and error, finally I enabled > > ftrace events on power subsystem and see that the freeze is precisely at the > > same time as drm_mode_getconnector is called on these events and its the Xorg > > process. I think since Xorg is busy on this drm_mode_getconnector ioctl, its > > not able to perform its duties. > > > > I get a stacktrace like so: > > Xorg-1285 [001] .... 801.156606: pm_qos_update_request: > > pm_qos_class=CPU_DMA_LATENCY value=-1 > > Xorg-1285 [001] .... 801.156607: pm_qos_update_target: > > action=UPDATE_REQ prev_value=0 curr_value=2000000000 > > Xorg-1285 [001] .... 801.156609: <stack trace> > > => pm_qos_update_target > > => intel_dp_aux_xfer > > => intel_dp_aux_transfer > > => drm_dp_dpcd_access > > => drm_dp_dpcd_read > > => intel_dp_read_dpcd > > => intel_dp_detect > > => drm_helper_probe_single_connector_modes > > => drm_mode_getconnector > > => drm_ioctl_kernel > > => drm_ioctl > > => do_vfs_ioctl > > => ksys_ioctl > > => __x64_sys_ioctl > > => do_syscall_64 > > => entry_SYSCALL_64_after_hwframe > > > > The X version I'm running is X.Org X Server 1.19.6 > > > > I also see these in /var/log/Xorg.0.log every 30 seconds and it seems > > correlated to the time of freezing: > > [ 1141.925] (--) modeset(0): HDMI max TMDS frequency 170000KHz > > [ 1142.223] (II) modeset(0): EDID vendor "HWP", prod id 13093 > > [ 1142.223] (II) modeset(0): Using hsync ranges from config file > > [ 1142.223] (II) modeset(0): Using vrefresh ranges from config file > > [ 1142.223] (II) modeset(0): Printing DDC gathered Modelines: > > [ 1142.223] (II) modeset(0): Modeline "1920x1080"x0.0 148.50 1920 2008 > > 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP) > > [ 1142.223] (II) modeset(0): Modeline "1920x1080"x0.0 148.50 1920 2448 > > 2492 2640 1080 1084 1089 1125 +hsync +vsync (56.2 kHz e) > > > > Let me know if you spot anything weird, and if you have any suggestions? > > Just for documenting it, the issue seems very similar to what is reported in > this comment: > https://forums.linuxmint.com/viewtopic.php?t=253475#p1457587 > > I am indeed using Cinammon as well. With the lid closed, the same 'modeset' > log messages appear and freeze the system every 30 seconds. 30s == hotplug polling kthread; the implication would be that it is generating a hotplug uevent everytime. drm.debug=0xe should record what it going on, so capture a dmesg with the lid closed. Platform and panel HW would be useful to know, dmesg from boot is usually sufficient. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
