https://bugzilla.kernel.org/show_bug.cgi?id=109481

Bug ID: 109481 Summary: Radeon Module crashing/freezing on ATI/AMD Evergreen (Radeon HD6250, Wrestler) Product: Drivers Version: 2.5 Kernel Version: 4.3.3 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: elbuffo166@gmail.com Regression: No

We have some hundred ThinClients (Fujitsu Futro S900) based on AMD G-T44R with AMD Radeon HD 6250.

I have tested with some Kernel-Versions, e.g. the newest of 4.1, 4.2, 4.3 and 4.4-RC5. On all these Kernels, System is freezing with a black screen, when radeon module with enabled modeset is loaded. With kernel parameter nomodeset system is not freezing, but the xorg ati driver will need kms.

I've tried booting an Ubuntu Live System to verify, that it is not the problem of my ThinClient distribution. Ubuntu 15.10 as well fails with a black screen.

I've the following trace:

radeon: Unknown symbol i2c_bit_add_bus (err 0) radeon: Unknown symbol i2c_bit_add_bus (err 0) [drm] radeon kernel modesetting enabled. [drm] initializing kernel modesetting (PALM 0x1002:0x9805 0x1734:0x11BD). [drm] register mmio base: 0xFEB00000 [drm] register mmio size: 262144 ATOM BIOS: AMD radeon 0000:00:01.0: VRAM: 384M 0x0000000000000000 - 0x0000000017FFFFFF (384M used) radeon 0000:00:01.0: GTT: 1024M 0x0000000018000000 - 0x0000000057FFFFFF [drm] Detected VRAM RAM=384M, BAR=256M [drm] RAM width 32bits DDR [TTM] Zone kernel: Available graphics memory: 443856 kiB [TTM] Zone highmem: Available graphics memory: 824158 kiB [TTM] Initializing pool allocator [drm] radeon: 384M of VRAM memory ready [drm] radeon: 1024M of GTT memory ready. [drm] Loading PALM Microcode [drm] Internal thermal controller without fan control [drm] Found smc ucode version: 0x00010601 [drm] radeon: dpm initialized [drm] GART: num cpu pages 262144, num gpu pages 262144 [drm] PCIE GART of 1024M enabled (table at 0x0000000000274000). radeon 0000:00:01.0: WB enabled radeon 0000:00:01.0: fence driver on ring 0 use gpu addr 0x0000000018000c00 and cpu addr 0xf1788c00 radeon 0000:00:01.0: fence driver on ring 3 use gpu addr 0x0000000018000c0c and cpu addr 0xf1788c0c radeon 0000:00:01.0: fence driver on ring 5 use gpu addr 0x0000000000072118 and cpu addr 0xf9432118 [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [drm] Driver supports precise vblank timestamp query. radeon 0000:00:01.0: radeon: MSI limited to 32-bit [drm] radeon: irq initialized. [drm] ring test on 0 succeeded in 1 usecs [drm] ring test on 3 succeeded in 3 usecs [drm] ring test on 5 succeeded in 1 usecs [drm] UVD initialized successfully. [drm] ib test on ring 0 succeeded in 0 usecs [drm] ib test on ring 3 succeeded in 0 usecs [drm] ib test on ring 5 succeeded [drm] Radeon Display Connectors [drm] Connector 0: [drm] DP-1 [drm] HPD1 [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c [drm] Encoders: [drm] DFP1: INTERNAL_UNIPHY [drm] Connector 1: [drm] DVI-D-1 [drm] HPD2 [drm] DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c [drm] Encoders: [drm] DFP2: INTERNAL_UNIPHY BUG: unable to handle kernel NULL pointer dereference at 00000024 IP: [<f90b7e91>] atombios_get_encoder_mode+0x87/0x178 [radeon] *pde = 00000000 Oops: 0000 [#1] SMP Modules linked in: radeon(+) i2c_algo_bit ipv6 ati_agp snd_hda_intel k10temp hwmon drm_kms_helper snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi ttm snd_hda_codec snd_hda_core fujitsu_laptop video drm snd_hwdep snd_pcm snd_timer snd agpgart soundcore syscopyarea sysfillrect sysimgblt fb_sys_fops button acpi_cpufreq squashfs [last unloaded: snd_hda_intel] CPU: 0 PID: 2457 Comm: modprobe Not tainted 4.3.0-slitaz #2 Hardware name: FUJITSU FUTRO S900/D3003-A1, BIOS V4.6.4.1 R1.14.0 for D3003-A1x 01/27/2012 task: f284a080 ti: d3430000 task.ti: d3430000 EIP: 0060:[<f90b7e91>] EFLAGS: 00010246 CPU: 0 EIP is at atombios_get_encoder_mode+0x87/0x178 [radeon] EAX: 00000000 EBX: 00000000 ECX: f167c9ec EDX: f167c9e0 ESI: f6699600 EDI: d3410000 EBP: 00000020 ESP: d3431d2c DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 CR0: 8005003b CR2: 00000024 CR3: 3418d000 CR4: 000006d0 Stack: f6699600 00000003 d3410000 f90b9524 f6699600 f911ed18 f167c9f8 00000020 f8302270 f6699600 f167c800 f83022ac f167c800 d3410000 00000000 f8302320 f6699200 f90797f8 d3410000 00000002 00000002 f167c800 f9075554 00000000 Call Trace: [<f90b9524>] ? radeon_atom_encoder_dpms+0x14/0xeb [radeon] [<f8302270>] ? drm_encoder_disable+0x25/0x2f [drm_kms_helper] [<f83022ac>] ? __drm_helper_disable_unused_functions+0x32/0x97 [drm_kms_helper] [<f8302320>] ? drm_helper_disable_unused_functions+0xf/0x17 [drm_kms_helper] [<f90797f8>] ? radeon_fbdev_init+0xa2/0xc8 [radeon] [<f9075554>] ? radeon_modeset_init+0x6b4/0x820 [radeon] [<f9059427>] ? radeon_driver_load_kms+0xce/0x16d [radeon] [<f81565f8>] ? drm_dev_register+0x53/0x8a [drm] [<f815822e>] ? drm_get_pci_dev+0xcf/0x15a [drm] [<c126df13>] ? pci_device_probe+0x5b/0xa8 [<c12def83>] ? driver_probe_device+0xbd/0x1e4 [<c12df0ee>] ? __driver_attach+0x44/0x5f [<c12ddd0c>] ? bus_for_each_dev+0x47/0x63 [<c12dec54>] ? driver_attach+0x11/0x13 [<c12df0aa>] ? driver_probe_device+0x1e4/0x1e4 [<c12de93f>] ? bus_add_driver+0xaf/0x180 [<f9168000>] ? 0xf9168000 [<c12df68c>] ? driver_register+0x6c/0x9d [<f9168000>] ? 0xf9168000 [<c100043d>] ? do_one_initcall+0xcd/0x144 [<c10946f3>] ? free_pcppages_bulk+0xe7/0x260 [<c1095d6a>] ? free_hot_cold_page+0x38/0xc4 [<c1090cd0>] ? do_init_module+0x43/0x19d [<c107caac>] ? load_module+0x1342/0x16c8 [<c102b4a3>] ? vmalloc_sync_all+0xcf/0xcf [<c107ceca>] ? SyS_init_module+0x98/0xb0 [<c1498df2>] ? syscall_call+0x7/0x7 Code: 8b 46 3c 83 f8 14 0f 84 00 01 00 00 83 f8 0b 0f 84 f7 00 00 00 89 f0 e8 2f ad fb ff 85 c0 89 c3 75 09 89 f0 e8 7d ad fb ff 89 c3 <8b> 43 24 48 83 f8 0d 77 68 ff 24 85 f4 e9 11 f9 83 3d 40 cb 14 EIP: [<f90b7e91>] atombios_get_encoder_mode+0x87/0x178 [radeon] SS:ESP 0068:d3431d2c CR2: 0000000000000024 ---[ end trace 29ec372e8e4d666d ]---