[7.0.0-1-cachyos] - amdgpu driver broken on Thinkpad T14Gen2
@johnnywhish
·
2026-04-23
·
via CachyOS Forum - Latest posts
Hello there! I installed CachyOS two days ago and the latest Linux kernel version 7 doesn’t want to boot to the desktop. The LTS-Kernel version 6.18.22-1-cachyos-lts is booting to the desktop as expected. Via ssh I collected the logs using the cachyos-bugreport.sh. The following excerpt of dmesg seems to be related: [ 11.324424] amdgpu 0000:07:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data [ 11.431303] amdgpu 0000:07:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data [ 11.551977] amdgpu 0000:07:00.0: [drm] *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting diagnostic data [ 11.813560] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed [ 11.833019] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed [ 11.852559] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1155: core_link_write_dpcd (DP_LINK_BW_SET) failed [ 12.620564] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed [ 12.640018] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed [ 12.659557] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1155: core_link_write_dpcd (DP_LINK_BW_SET) failed [ 13.163239] wlan0: authenticate with <mac-address-redacted> (local address=<mac-address-redacted>) [ 13.324278] wlan0: send auth to <mac-address-redacted> (try 1/3) [ 13.326499] wlan0: <mac-address-redacted> denied authentication (status 30) [ 13.476832] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed [ 13.496286] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed [ 13.515831] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1155: core_link_write_dpcd (DP_LINK_BW_SET) failed [ 13.606297] wlan0: No basic rates, using min rate instead [ 13.615001] wlan0: authenticate with <mac-address-redacted> (local address=<mac-address-redacted>) [ 13.750910] wlan0: send auth to <mac-address-redacted> (try 1/3) [ 13.872995] wlan0: authenticate with <mac-address-redacted> (local address=<mac-address-redacted>) [ 13.873006] wlan0: send auth to <mac-address-redacted> (try 1/3) [ 13.911682] wlan0: authenticated [ 13.913386] wlan0: associate with <mac-address-redacted> (try 1/3) [ 14.023645] wlan0: associate with <mac-address-redacted> (try 2/3) [ 14.127637] wlan0: associate with <mac-address-redacted> (try 3/3) [ 14.239675] wlan0: association with <mac-address-redacted> timed out [ 14.389384] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1122: core_link_write_dpcd (DP_DOWNSPREAD_CTRL) failed [ 14.408919] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1127: core_link_write_dpcd (DP_LANE_COUNT_SET) failed [ 14.428380] amdgpu 0000:07:00.0: [drm] *ERROR* dpcd_set_link_settings:1155: core_link_write_dpcd (DP_LINK_BW_SET) failed You can find the whole log at this pastebin: cae4be4 Cheers!
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