On my test machine Xorg doesn't start anymore when I kexec into a 3.11.0-rc3 kernel. On cold boot everything is fine:
[drm] Initialized drm 1.1.0 20060810 [drm] radeon kernel modesetting enabled. [drm] initializing kernel modesetting (RS780 0x1002:0x9614 0x1043:0x834D). [drm] register mmio base: 0xFBEE0000 [drm] register mmio size: 65536 ATOM BIOS: 113 radeon 0000:01:05.0: VRAM: 128M 0x00000000C0000000 - 0x00000000C7FFFFFF (128M used) radeon 0000:01:05.0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF [drm] Detected VRAM RAM=128M, BAR=128M [drm] RAM width 32bits DDR [TTM] Zone kernel: Available graphics memory: 4082356 kiB [TTM] Zone dma32: Available graphics memory: 2097152 kiB [TTM] Initializing pool allocator [TTM] Initializing DMA pool allocator [drm] radeon: 128M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. [drm] GART: num cpu pages 131072, num gpu pages 131072 [drm] Loading RS780 Microcode [drm] PCIE GART of 512M enabled (table at 0x00000000C0040000). radeon 0000:01:05.0: WB enabled radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000a0000c00 and cpu addr 0xffff880215c45c00 radeon 0000:01:05.0: fence driver on ring 3 use gpu addr 0x00000000a0000c0c and cpu addr 0xffff880215c45c0c [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] Driver supports precise vblank timestamp query. [drm] radeon: irq initialized. radeon 0000:01:05.0: setting latency timer to 64 [drm] ring test on 0 succeeded in 0 usecs [drm] ring test on 3 succeeded in 1 usecs [drm] ib test on ring 0 succeeded in 0 usecs [drm] ib test on ring 3 succeeded in 0 usecs [drm] Radeon Display Connectors [drm] Connector 0: [drm] VGA-1 [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c [drm] Encoders: [drm] CRT1: INTERNAL_KLDSCP_DAC1 [drm] Connector 1: [drm] DVI-D-1 [drm] HPD3 [drm] DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c [drm] Encoders: [drm] DFP3: INTERNAL_KLDSCP_LVTMA == power state 0 == ui class: none internal class: boot caps: video uvd vclk: 0 dclk: 0 power level 0 sclk: 50000 vddc_index: 2 power level 1 sclk: 50000 vddc_index: 2 status: c r b == power state 1 == ui class: performance internal class: none caps: video uvd vclk: 0 dclk: 0 power level 0 sclk: 50000 vddc_index: 1 power level 1 sclk: 70000 vddc_index: 2 status: == power state 2 == ui class: none internal class: uvd caps: video uvd vclk: 53300 dclk: 40000 power level 0 sclk: 50000 vddc_index: 1 power level 1 sclk: 50000 vddc_index: 1 status: switching from power state: ui class: none internal class: boot caps: video uvd vclk: 0 dclk: 0 power level 0 sclk: 50000 vddc_index: 2 power level 1 sclk: 50000 vddc_index: 2 status: c b switching to power state: ui class: performance internal class: none caps: video uvd vclk: 0 dclk: 0 power level 0 sclk: 50000 vddc_index: 1 power level 1 sclk: 70000 vddc_index: 2 status: r [drm] radeon: dpm initialized [drm] fb mappable at 0xF0142000 [drm] vram apper at 0xF0000000 [drm] size 7299072 [drm] fb depth is 24 [drm] pitch is 6912 But after I run kexec things go wrong: [drm] Initialized drm 1.1.0 20060810 [drm] radeon kernel modesetting enabled. [drm] initializing kernel modesetting (RS780 0x1002:0x9614 0x1043:0x834D). [drm] register mmio base: 0xFBEE0000 [drm] register mmio size: 65536 ATOM BIOS: 113 radeon 0000:01:05.0: VRAM: 128M 0x00000000C0000000 - 0x00000000C7FFFFFF (128M used) radeon 0000:01:05.0: GTT: 512M 0x00000000A0000000 - 0x00000000BFFFFFFF [drm] Detected VRAM RAM=128M, BAR=128M [drm] RAM width 32bits DDR [TTM] Zone kernel: Available graphics memory: 4082356 kiB [TTM] Zone dma32: Available graphics memory: 2097152 kiB [TTM] Initializing pool allocator [TTM] Initializing DMA pool allocator [drm] radeon: 128M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. [drm] GART: num cpu pages 131072, num gpu pages 131072 [drm] Loading RS780 Microcode [drm] PCIE GART of 512M enabled (table at 0x00000000C0040000). radeon 0000:01:05.0: WB enabled radeon 0000:01:05.0: fence driver on ring 0 use gpu addr 0x00000000a0000c00 and cpu addr 0xffff880215c45c00 radeon 0000:01:05.0: fence driver on ring 3 use gpu addr 0x00000000a0000c0c and cpu addr 0xffff880215c45c0c [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] Driver supports precise vblank timestamp query. [drm] radeon: irq initialized. radeon 0000:01:05.0: setting latency timer to 64 [drm] ring test on 0 succeeded in 0 usecs [drm:r600_dma_ring_test] *ERROR* radeon: ring 3 test failed (0xCAFEDEAD) radeon 0000:01:05.0: disabling GPU acceleration radeon 0000:01:05.0: ffff8802161eb400 unpin not necessary [drm] Radeon Display Connectors [drm] Connector 0: [drm] VGA-1 [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c [drm] Encoders: [drm] CRT1: INTERNAL_KLDSCP_DAC1 [drm] Connector 1: [drm] DVI-D-1 [drm] HPD3 [drm] DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c [drm] Encoders: [drm] DFP3: INTERNAL_KLDSCP_LVTMA == power state 0 == ui class: none internal class: boot caps: video uvd vclk: 0 dclk: 0 power level 0 sclk: 50000 vddc_index: 2 power level 1 sclk: 50000 vddc_index: 2 status: c r b == power state 1 == ui class: performance internal class: none caps: video uvd vclk: 0 dclk: 0 power level 0 sclk: 50000 vddc_index: 1 power level 1 sclk: 70000 vddc_index: 2 status: == power state 2 == ui class: none internal class: uvd caps: video uvd vclk: 53300 dclk: 40000 power level 0 sclk: 50000 vddc_index: 1 power level 1 sclk: 50000 vddc_index: 1 status: [drm:radeon_pm_init_dpm] *ERROR* radeon: dpm initialization failed [drm] fb mappable at 0xF0142000 [drm] vram apper at 0xF0000000 [drm] size 7299072 [drm] fb depth is 24 [drm] pitch is 6912 >From Xorg.0.log: ... [ 5.217] (II) RADEON(0): VRAM usage limit set to 104864K [ 5.218] (==) RADEON(0): Backing store disabled [ 5.218] (WW) RADEON(0): Direct rendering disabled [ 5.218] (II) RADEON(0): Acceleration disabled [ 5.218] (==) RADEON(0): DPMS enabled [ 5.218] (==) RADEON(0): Silken mouse enabled [ 5.218] (II) RADEON(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 5.219] (--) RandR disabled [ 5.235] (II) AIGLX: Screen 0 is not DRI2 capable [ 5.235] (II) AIGLX: Screen 0 is not DRI capable [ 5.248] (II) AIGLX: Loaded and initialized swrast [ 5.248] (II) GLX: Initialized DRISWRAST GL provider for screen 0 [ 5.252] (EE) RADEON(0): Rotation requires acceleration! [ 5.252] (EE) Fatal server error: [ 5.252] (EE) failed to create screen resources(EE) [ 5.252] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 5.252] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 5.252] (EE) [ 5.436] (EE) Server terminated with error (1). Closing log file. I've bisected the issue to: commit f5d9b7f0f93c6a7d40750b8b5528a1e0f0c678fb Author: Alex Deucher <alexander.deuc...@amd.com> Date: Thu Jul 25 21:46:21 2013 -0400 drm/radeon/dpm: fix r600_enable_sclk_control() Actually program the correct register to enable engine clock scaling control. Signed-off-by: Alex Deucher <alexander.deuc...@amd.com> Reverting this commit on top of rc3 "fixes" the problem for me. -- Markus _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel