Got this now the 2nd time in row on my G5 11.2 trying to copy a btrfs partition via gparted: [...] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 756 at arch/powerpc/kernel/exceptions-64s.S:2863 masked_interrupt+0xc/0xe4 Modules linked in: auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc uas usb_storage windfarm_cpufreq_clamp windfarm_smu_sensors windfarm_smu_controls nouveau windfarm_pm112 snd_aoa_codec_onyx snd_aoa_fabric_layout snd_aoa windfarm_pid snd_aoa_i2sbus snd_aoa_soundbus firewire_ohci windfarm_smu_sat windfarm_lm75_sensor windfarm_max6690_sensor led_class i2c_algo_bit drm_ttm_helper ttm snd_pcm windfarm_core firewire_core drm_display_helper snd_timer sr_mod crc_itu_t ohci_pci ehci_pci cdrom ohci_hcd ehci_hcd snd drm_kms_helper soundcore syscopyarea rack_meter sysfillrect usbcore sysimgblt cfbfillrect pmac_zilog serial_core cfbimgblt cfbcopyarea usb_common tg3 hwmon cfg80211 rfkill zram zsmalloc drm fuse drm_panel_orientation_quirks backlight configfs CPU: 0 PID: 756 Comm: kworker/0:0 Tainted: G T 6.2.0-gentoo-PMacG5 #1 Hardware name: PowerMac11,2 PPC970MP 0x440101 PowerMac Workqueue: events dbs_work_handler NIP: c00000000000ac50 LR: c000000000952afc CTR: c000000000007e10 REGS: c00000013b48b880 TRAP: 0700 Tainted: G T (6.2.0-gentoo-PMacG5) MSR: 9000000000021032 CR: 44002220 XER: 00000000 IRQMASK: 1 GPR00: 0000000040808000 c00000013b48bb20 c000000000e34900 3000400000000000 GPR04: 9000000000009032 9000000000009032 0000000000000000 0000000000000000 GPR08: 0000000000000000 0000000000000005 0000000000000004 c000000000022e3c GPR12: 9000000000009032 c00000000135a000 c0000000000bf658 c00000001e3b4e80 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 c0000000011e9658 GPR24: c00000001964d93c c00000047f71e505 c00000013b48bbf8 0000000000000000 GPR28: 0000000000000000 0000000000408001 0000000000000000 0000000000000009 NIP [c00000000000ac50] masked_interrupt+0xc/0xe4 LR [c000000000952afc] g5_scom_switch_freq+0xcc/0x1e0 Call Trace: [c00000013b48bb20] [c000000000952a80] g5_scom_switch_freq+0x50/0x1e0 (unreliable) [c00000013b48bb70] [c00000000095232c] g5_cpufreq_target+0x2c/0x50 [c00000013b48bb90] [c00000000094ba68] __cpufreq_driver_target+0x198/0x3e0 [c00000013b48bc50] [c00000000094f8e4] od_dbs_update+0xf4/0x2b0 [c00000013b48bca0] [c000000000950e54] dbs_work_handler+0x54/0xb0 [c00000013b48bce0] [c0000000000b39a0] process_one_work+0x280/0x430 [c00000013b48bd80] [c0000000000b3be8] worker_thread+0x98/0x500 [c00000013b48be00] [c0000000000bf76c] kthread+0x11c/0x130 [c00000013b48be50] [c00000000000bd5c] ret_from_kernel_thread+0x5c/0x64 --- interrupt: 0 at 0x0 NIP: 0000000000000000 LR: 0000000000000000 CTR: 0000000000000000 REGS: c00000013b48be80 TRAP: 0000 Tainted: G T (6.2.0-gentoo-PMacG5) MSR: 0000000000000000 <> CR: 00000000 XER: 00000000 IRQMASK: 0 GPR00: 0000000000000000 c00000013b48c000 0000000000000000 0000000000000000 GPR04: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR12: 0000000000000000 0000000000000000 c0000000000bf658 c00000001e3b4e80 GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR24: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 GPR28: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 NIP [0000000000000000] 0x0 LR [0000000000000000] 0x0 --- interrupt: 0 Code: e96a0110 e96a0198 e96a0220 e96a02a8 e96a0330 e96a03b8 394a0400 4200ffdc 4e800020 912d00b4 892d0153 71290025 <0b090000> 892d0153 7d295378 992d0153 ---[ end trace 0000000000000000 ]--- watchdog: CPU 1 detected hard LOCKUP on other CPUs 0 watchdog: CPU 1 TB:47058144489, last SMP heartbeat TB:46524826927 (15999ms ago) Kernel panic - not syncing: Hard LOCKUP CPU: 1 PID: 0 Comm: swapper/1 Tainted: P T 6.2.0-gentoo-PMacG5 #1 Hardware name: PowerMac11,2 PPC970MP 0x440101 PowerMac Call Trace: [c0000000015137b0] [c000000000b9fabc] dump_stack_lvl+0x80/0xd8 (unreliable) [c0000000015137e0] [c000000000086368] panic+0x170/0x3d8 [c000000001513880] [c000000000085d40] add_taint+0x0/0x100 [c0000000015138e0] [c00000000002cc04] watchdog_timer_fn+0x4e4/0x4f0 [c0000000015139a0] [c0000000001419b8] __hrtimer_run_queues+0x1b8/0x2f0 [c000000001513a30] [c000000000142f20] hrtimer_interrupt+0x120/0x330 [c000000001513ae0] [c00000000001d47c] timer_interrupt+0x22c/0x460 [c000000001513b30] [c000000000008924] decrementer_common_virt+0x214/0x220 --- interrupt: 900 at power4_idle_nap+0x30/0x34 NIP: c000000000034558 LR: c000000000017254 CTR: c0000000000171d0 REGS: c000000001513b60 TRAP: 0900 Tainted: P T (6.2.0-gentoo-PMacG5) MSR: 9000000000009032 CR: 44fff824 XER: 00000000 IRQMASK: 0 GPR00: c0000000000170e0 c000000001513e00 c000000000e34900 0000000000000001 GPR04: 0000000000000000 0000000000000000 0000000000000000 9000000000049032 GPR08: 0000000000000001 c0000000014fa480 0000000000000000 0000000000000000 GPR12: c0000000000171d0 c00000000ffffc00 00000000f8000000 0000000000000000 GPR16: 00000000fff03244 0000000000000000 c000000000039490 c00000047fb4cc90 GPR20: c000000001281a30 c000000000039460 c000000000039430 c0000000010a3508 GPR24: 0000000000000001 0000000000080000 c000000001281aa8 0000000000000001 GPR28: c000000001281a18 c0000000014fa500 c0000000014fa480 c000000001281970 NIP [c000000000034558] power4_idle_nap+0x30/0x34 LR [c000000000017254] power4_idle+0x84/0xd0 --- interrupt: 900 [c000000001513e00] [c000000001513e50] 0xc000000001513e50 (unreliable) [c000000001513e30] [c0000000000170e0] arch_cpu_idle+0x60/0x150 [c000000001513e60] [c000000000be0c1c] default_idle_call+0x4c/0x94 [c000000001513e80] [c0000000000e7444] do_idle+0x114/0x1f0 [c000000001513ee0] [c0000000000e7758] cpu_startup_entry+0x38/0x40 [c000000001513f10] [c00000000003b170] start_secondary+0x560/0x9e0 [c000000001513fe0] [c00000000000c0ec] start_secondary_prolog+0x10/0x14 Rebooting in 40 seconds.. [...] Full dmesg + kernel .config attached. Regards, Erhard