It turns out that this is related to kms. Each of the following 3 actions "fixes" it:
1. Add nomodeset to kernel boot options, or 2. Add radeon.modeset=0 to kernel boot options, or 3. Add "options radeon modeset=0" to a modprobe.d config file Using workaround #3 allowed me to get debug output of the problem. I stopped X, removed the radeon module, and then inserted it using modprobe radeon modeset=1. This instantly blanked the virtual console that I was typing in, and logged the messages below: Jul 20 19:27:28 hitchhiker kernel: [ 148.952280] [drm] radeon kernel modesetting enabled. Jul 20 19:27:28 hitchhiker kernel: [ 148.958996] [drm] radeon: Initializing kernel modesetting. Jul 20 19:27:28 hitchhiker kernel: [ 148.959353] [drm] register mmio base: 0xFDCF0000 Jul 20 19:27:28 hitchhiker kernel: [ 148.959358] [drm] register mmio size: 65536 Jul 20 19:27:28 hitchhiker kernel: [ 148.960690] ATOM BIOS: ATI Jul 20 19:27:28 hitchhiker kernel: [ 148.960947] [drm] GPU reset succeed (RBBM_STATUS=0x10000140) Jul 20 19:27:28 hitchhiker kernel: [ 148.960976] [drm] radeon: VRAM 128M Jul 20 19:27:28 hitchhiker kernel: [ 148.960980] [drm] radeon: VRAM from 0xD8000000 to 0xDFFFFFFF Jul 20 19:27:28 hitchhiker kernel: [ 148.960984] [drm] radeon: GTT 512M Jul 20 19:27:28 hitchhiker kernel: [ 148.960987] [drm] radeon: GTT from 0x00000000 to 0x1FFFFFFF Jul 20 19:27:28 hitchhiker kernel: [ 148.961097] [drm] radeon: using MSI. Jul 20 19:27:28 hitchhiker kernel: [ 148.961143] [drm] radeon: irq initialized. Jul 20 19:27:28 hitchhiker kernel: [ 148.962198] [drm] Detected VRAM RAM=128M, BAR=128M Jul 20 19:27:28 hitchhiker kernel: [ 148.962209] [drm] RAM width 128bits DDR Jul 20 19:27:28 hitchhiker kernel: [ 148.962457] [TTM] Zone kernel: Available graphics memory: 1964360 kiB. Jul 20 19:27:28 hitchhiker kernel: [ 148.962504] [drm] radeon: 128M of VRAM memory ready Jul 20 19:27:28 hitchhiker kernel: [ 148.962508] [drm] radeon: 512M of GTT memory ready. Jul 20 19:27:28 hitchhiker kernel: [ 148.962561] [drm] GART: num cpu pages 131072, num gpu pages 131072 Jul 20 19:27:28 hitchhiker kernel: [ 148.970961] [drm] radeon: 1 quad pipes, 1 z pipes initialized. Jul 20 19:27:28 hitchhiker kernel: [ 148.973123] [drm] radeon: cp idle (0x10000000) Jul 20 19:27:28 hitchhiker kernel: [ 148.973243] [drm] Loading RS690/RS740 Microcode Jul 20 19:27:28 hitchhiker kernel: [ 148.973423] platform radeon_cp.0: firmware: requesting radeon/RS690_cp.bin Jul 20 19:27:28 hitchhiker kernel: [ 148.978247] [drm] radeon: ring at 0x0000000000000000 Jul 20 19:27:28 hitchhiker kernel: [ 148.978278] [drm] ring test succeeded in 1 usecs Jul 20 19:27:28 hitchhiker kernel: [ 148.978666] [drm] radeon: ib pool ready. Jul 20 19:27:28 hitchhiker kernel: [ 148.978848] [drm] ib test succeeded in 0 usecs Jul 20 19:27:28 hitchhiker kernel: [ 148.979089] [drm] Default TV standard: NTSC Jul 20 19:27:28 hitchhiker kernel: [ 148.979333] [drm] Radeon Display Connectors Jul 20 19:27:28 hitchhiker kernel: [ 148.979337] [drm] Connector 0: Jul 20 19:27:28 hitchhiker kernel: [ 148.979340] [drm] VGA Jul 20 19:27:28 hitchhiker kernel: [ 148.979346] [drm] DDC: 0x7e50 0x7e40 0x7e54 0x7e44 0x7e58 0x7e48 0x7e5c 0x7e4c Jul 20 19:27:28 hitchhiker kernel: [ 148.979349] [drm] Encoders: Jul 20 19:27:28 hitchhiker kernel: [ 148.979352] [drm] CRT1: INTERNAL_KLDSCP_DAC1 Jul 20 19:27:28 hitchhiker kernel: [ 148.979356] [drm] Connector 1: Jul 20 19:27:28 hitchhiker kernel: [ 148.979359] [drm] S-video Jul 20 19:27:28 hitchhiker kernel: [ 148.979361] [drm] Encoders: Jul 20 19:27:28 hitchhiker kernel: [ 148.979364] [drm] TV1: INTERNAL_KLDSCP_DAC1 Jul 20 19:27:28 hitchhiker kernel: [ 148.979367] [drm] Connector 2: Jul 20 19:27:28 hitchhiker kernel: [ 148.979370] [drm] HDMI-A Jul 20 19:27:28 hitchhiker kernel: [ 148.979373] [drm] HPD2 Jul 20 19:27:28 hitchhiker kernel: [ 148.979377] [drm] DDC: 0x7e40 0x7e60 0x7e44 0x7e64 0x7e48 0x7e68 0x7e4c 0x7e6c Jul 20 19:27:28 hitchhiker kernel: [ 148.979381] [drm] Encoders: Jul 20 19:27:28 hitchhiker kernel: [ 148.979384] [drm] DFP2: INTERNAL_DDI Jul 20 19:27:28 hitchhiker kernel: [ 148.979387] [drm] Connector 3: Jul 20 19:27:28 hitchhiker kernel: [ 148.979390] [drm] DVI-D Jul 20 19:27:28 hitchhiker kernel: [ 148.979394] [drm] DDC: 0x7e40 0x7e50 0x7e44 0x7e54 0x7e48 0x7e58 0x7e4c 0x7e5c Jul 20 19:27:28 hitchhiker kernel: [ 148.979398] [drm] Encoders: Jul 20 19:27:28 hitchhiker kernel: [ 148.979401] [drm] DFP3: INTERNAL_LVTM1 Jul 20 19:27:28 hitchhiker kernel: [ 149.044036] Jul 20 19:27:28 hitchhiker kernel: [ 149.100499] Jul 20 19:27:28 hitchhiker kernel: [ 149.156769] Jul 20 19:27:28 hitchhiker kernel: [ 149.215148] Jul 20 19:27:28 hitchhiker kernel: [ 149.215150] radeon 0000:01:05.0: HDMI Type A-1: EDID invalid. Jul 20 19:27:29 hitchhiker kernel: [ 149.508155] Jul 20 19:27:29 hitchhiker kernel: [ 149.564389] Jul 20 19:27:29 hitchhiker kernel: [ 149.620638] Jul 20 19:27:29 hitchhiker kernel: [ 149.678867] Jul 20 19:27:29 hitchhiker kernel: [ 149.678868] radeon 0000:01:05.0: HDMI Type A-1: EDID invalid. Jul 20 19:27:29 hitchhiker kernel: [ 149.751509] [drm] fb mappable at 0xF0040000 Jul 20 19:27:29 hitchhiker kernel: [ 149.751510] [drm] vram apper at 0xF0000000 Jul 20 19:27:29 hitchhiker kernel: [ 149.751511] [drm] size 7257600 Jul 20 19:27:29 hitchhiker kernel: [ 149.751513] [drm] fb depth is 24 Jul 20 19:27:29 hitchhiker kernel: [ 149.751514] [drm] pitch is 6912 Jul 20 19:27:29 hitchhiker kernel: [ 149.751604] fb1: radeondrmfb frame buffer device Jul 20 19:27:29 hitchhiker kernel: [ 149.751606] registered panic notifier Jul 20 19:27:29 hitchhiker kernel: [ 149.751611] [drm] Initialized radeon 2.0.0 20080528 for 0000:01:05.0 on minor 0 Much less is logged when inserting the module with modeset=0 : Jul 20 19:29:14 hitchhiker kernel: [ 21.997011] [drm] Initialized drm 1.1.0 20060810 Jul 20 19:29:14 hitchhiker kernel: [ 22.232362] [drm] Initialized radeon 1.32.0 20080528 for 0000:01:05.0 on minor 0 Jul 20 19:29:15 hitchhiker kernel: [ 23.107216] [drm] Setting GART location based on new memory map Jul 20 19:29:15 hitchhiker kernel: [ 23.107621] [drm] Loading RS690/RS740 Microcode Jul 20 19:29:15 hitchhiker kernel: [ 23.107625] platform radeon_cp.0: firmware: requesting radeon/RS690_cp.bin Jul 20 19:29:15 hitchhiker kernel: [ 23.165467] [drm] Num pipes: 1 Jul 20 19:29:15 hitchhiker kernel: [ 23.165475] [drm] writeback test succeeded in 1 usecs -- virtual console broken https://bugs.launchpad.net/bugs/574814 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
