https://bugzilla.kernel.org/show_bug.cgi?id=75211 --- Comment #7 from Darren Salt <bugspam@xxxxxxxxxxxxxxxxx> --- Can't do that (radeon module is built in, and no debug symbols – should switch that on), but ksymoops output (below) is clear enough for me to determine that the marked line is where the bug makes itself known: if (pll->flags & RADEON_PLL_USE_FRAC_FB_DIV) { vco_min *= 10; vco_max *= 10; } /* here */ post_div_min = vco_min / target_clock; if ((target_clock * post_div_min) < vco_min) ++post_div_min; if (post_div_min < pll->min_post_div) post_div_min = pll->min_post_div; Which means that target_clock is zero, which means that freq is 0 or freq/10 is 0. >>RIP; ffffffff812513d0 <radeon_compute_pll_avivo+b6/324> <===== >>RAX; 00000000000927c0 <__per_cpu_end+804c0/fedd00> >>RBX; ffff880236dc8210 <phys_startup_64+ffff880235dc8210/ffffffff80000000> >>RCX; 0000000000124f80 <__per_cpu_end+112c80/fedd00> >>RSI; 00000000000927c0 <__per_cpu_end+804c0/fedd00> >>RBP; ffff8800bd6d2c00 <phys_startup_64+ffff8800bc6d2c00/ffffffff80000000> >>R08; ffff88021b08fb08 <phys_startup_64+ffff88021a08fb08/ffffffff80000000> >>R09; ffff88021b08fb00 <phys_startup_64+ffff88021a08fb00/ffffffff80000000> >>R12; ffff880236dc8000 <phys_startup_64+ffff880235dc8000/ffffffff80000000> >>R14; 0000000000004ff6 <exception_stacks+ff6/6000> Trace; ffffffff81227da9 <drm_detect_hdmi_monitor+54/69> Trace; ffffffff8123ed95 <atombios_crtc_mode_set+100/593> Trace; ffffffff812d6725 <class_dev_iter_next+c/33> Trace; ffffffff812d68ed <class_for_each_device+8a/9f> Trace; ffffffff81213ccd <drm_crtc_helper_set_mode+2a3/424> Trace; ffffffff812145a5 <drm_crtc_helper_set_config+601/853> Trace; ffffffff81250650 <radeon_crtc_set_config+3e/d9> Trace; ffffffff81222183 <drm_mode_set_config_internal+48/c0> Trace; ffffffff81224843 <drm_mode_setcrtc+3d3/487> Trace; ffffffff81250dac <radeon_crtc_load_lut+275/630> Trace; ffffffff81219f06 <drm_ioctl+337/3a6> Trace; ffffffff81224470 <drm_mode_setcrtc+0/487> Trace; ffffffff81468fcc <_raw_spin_unlock_irqrestore+f/21> Trace; ffffffff81234864 <radeon_drm_ioctl+42/6e> Trace; ffffffff810b10a7 <do_vfs_ioctl+356/420> Trace; ffffffff810b8747 <__fget+64/6c> Trace; ffffffff810b11a4 <sys_ioctl+33/58> Trace; ffffffff81469ca6 <system_call_fastpath+1a/1f> Code; ffffffff812513a5 <radeon_compute_pll_avivo+8b/324> 0000000000000000 <_RIP>: Code; ffffffff812513a5 <radeon_compute_pll_avivo+8b/324> 0: 09 8b 6b 08 89 6c or %ecx,0x6c89086b(%rbx) Code; ffffffff812513ab <radeon_compute_pll_avivo+91/324> 6: 24 20 and $0x20,%al Code; ffffffff812513ad <radeon_compute_pll_avivo+93/324> 8: eb 5f jmp 69 <_RIP+0x69> Code; ffffffff812513af <radeon_compute_pll_avivo+95/324> a: 80 e5 20 and $0x20,%ch Code; ffffffff812513b2 <radeon_compute_pll_avivo+98/324> d: 74 08 je 17 <_RIP+0x17> Code; ffffffff812513b4 <radeon_compute_pll_avivo+9a/324> f: 8b 73 1c mov 0x1c(%rbx),%esi Code; ffffffff812513b7 <radeon_compute_pll_avivo+9d/324> 12: 8b 4b 20 mov 0x20(%rbx),%ecx Code; ffffffff812513ba <radeon_compute_pll_avivo+a0/324> 15: eb 06 jmp 1d <_RIP+0x1d> Code; ffffffff812513bc <radeon_compute_pll_avivo+a2/324> 17: 8b 73 14 mov 0x14(%rbx),%esi Code; ffffffff812513bf <radeon_compute_pll_avivo+a5/324> 1a: 8b 4b 18 mov 0x18(%rbx),%ecx Code; ffffffff812513c2 <radeon_compute_pll_avivo+a8/324> 1d: 85 ff test %edi,%edi Code; ffffffff812513c4 <radeon_compute_pll_avivo+aa/324> 1f: 74 06 je 27 <_RIP+0x27> Code; ffffffff812513c6 <radeon_compute_pll_avivo+ac/324> 21: 6b f6 0a imul $0xa,%esi,%esi Code; ffffffff812513c9 <radeon_compute_pll_avivo+af/324> 24: 6b c9 0a imul $0xa,%ecx,%ecx Code; ffffffff812513cc <radeon_compute_pll_avivo+b2/324> 27: 31 d2 xor %edx,%edx Code; ffffffff812513ce <radeon_compute_pll_avivo+b4/324> 29: 89 f0 mov %esi,%eax Code; ffffffff812513d0 <radeon_compute_pll_avivo+b6/324> <===== 2b: 41 f7 f5 div %r13d <===== Code; ffffffff812513d3 <radeon_compute_pll_avivo+b9/324> 2e: 89 c2 mov %eax,%edx Code; ffffffff812513d5 <radeon_compute_pll_avivo+bb/324> 30: 8d 68 01 lea 0x1(%rax),%ebp Code; ffffffff812513d8 <radeon_compute_pll_avivo+be/324> 33: 41 0f af d5 imul %r13d,%edx Code; ffffffff812513dc <radeon_compute_pll_avivo+c2/324> 37: 39 f2 cmp %esi,%edx Code; ffffffff812513de <radeon_compute_pll_avivo+c4/324> 39: 8b 53 30 mov 0x30(%rbx),%edx Code; ffffffff812513e1 <radeon_compute_pll_avivo+c7/324> 3c: 0f 43 e8 cmovae %eax,%ebp Code; ffffffff812513e4 <radeon_compute_pll_avivo+ca/324> 3f: 89 .byte 0x89 -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
