https://bugzilla.kernel.org/show_bug.cgi?id=211807 Matt Berry (matthew.william.berry@xxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |matthew.william.berry@gmail | |.com --- Comment #11 from Matt Berry (matthew.william.berry@xxxxxxxxx) --- I'm seeing this when I use my work laptop (HP SKU 3YG73UC) with a Startech DP KVM (sv231dpu2) on Ubuntu 20.04 (5.11.0-37-generic). It doesn't happen every time, but when I switch the KVM over I'll hear the fan kick on and when I switch the KVM back I'll see the following in `dmesg`. Given that it's a work laptop, I'll have to follow their kernel release cycle, but will report back if I see it on newer kernels as they roll out. ``` sudo journalctl -b 0 | grep -i firmware | grep i915 Oct 12 14:44:59 u41fc3826021951.ant.amazon.com kernel: i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4) sudo dmesg | egrep -vi 'audit|usb |hub |input: ' [941754.942373] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed [941754.964462] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [941953.993504] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [942109.330113] loop12: detected capacity change from 0 to 1232 [942125.974833] loop13: detected capacity change from 0 to 337424 [942146.986960] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [942392.995237] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [942967.950060] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed [942967.972573] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [942990.984072] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [943003.939382] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed [943003.962504] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [943227.981538] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [943765.979086] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [943775.950453] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed [943775.981195] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [944033.975975] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [945830.946882] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed [945830.969342] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [946098.985432] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [947569.935525] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 1: DPCD read on addr 0x4b0 for 1 bytes NAKed [947569.957792] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed [947604.971146] [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 000000003ba372b9 port 3: DPCD read on addr 0x4b0 for 1 bytes NAKed ``` -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
