<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [MCP79][Regression] Unhandled NULL pointer dereference in nvkm_object_unmap since kernel 4.15" href="https://bugs.freedesktop.org/show_bug.cgi?id=105173#c10">Comment # 10</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [MCP79][Regression] Unhandled NULL pointer dereference in nvkm_object_unmap since kernel 4.15" href="https://bugs.freedesktop.org/show_bug.cgi?id=105173">bug 105173</a> from <a class="email" href="mailto:pierre.morrow@free.fr" title="Pierre Moreau <pierre.morrow@free.fr>"> Pierre Moreau</a> <pre>(In reply to Nick Lee from <a href="show_bug.cgi?id=105173#c8">comment #8</a>) > Also tried: > > Vanilla kernel 4.15.4-300.vanilla.knurd.1.fc27.x86_64 > mesa-17.3.5 > wayland session > reproducible What exactly is reproducible? The artefacts I would assume, but which error exactly? The NULL pointer dereference, or the “trapped read at 0080000000 on channel 1 [0fbb0000 DRM] engine 00 [PGRAPH] client 03 [DISPATCH] subclient 04 [M2M_IN] reason 00000006 [NULL_DMAOBJ]” one? I did manage to reproduce the second one with Wayland, but still no luck with the first one. (In reply to Nick Lee from <a href="show_bug.cgi?id=105173#c8">comment #8</a>) > Fedora-Workstation-Live-x86_64-Rawhide-20180220.n.0.iso > wayland session > mesa-18.0.0-0.1.rc4.fc28.x86_64 > Got artefacts with dmesg output: > > [ 1035.437016] nouveau 0000:03:00.0: swiotlb buffer is full (sz: 2097152 > bytes) > [ 1035.437020] nouveau 0000:03:00.0: swiotlb: coherent allocation failed, > size=2097152 > [ 1035.437023] CPU: 0 PID: 1842 Comm: gnome-shell Not tainted > 4.16.0-0.rc2.git0.1.fc28.x86_64 #1 > [ 1035.437024] Hardware name: NVIDIA MCP7A/MCP7A, BIOS 6.00 PG 04/22/2009 > [ 1035.437025] Call Trace: > [ 1035.437036] dump_stack+0x5c/0x85 > [ 1035.437040] swiotlb_alloc_coherent+0x1c3/0x1e0 > [ 1035.437052] ttm_dma_pool_get_pages+0x21a/0x620 [ttm] > [ 1035.437057] ttm_dma_populate+0xdd/0x390 [ttm] > [ 1035.437062] ttm_tt_bind+0x2e/0x60 [ttm] > [ 1035.437067] ttm_bo_handle_move_mem+0x4cf/0x550 [ttm] > [ 1035.437073] ttm_bo_validate+0x119/0x130 [ttm] > [ 1035.437104] ? drm_get_edid_switcheroo+0x16/0x40 [drm] > [ 1035.437109] ttm_bo_init_reserved+0x334/0x380 [ttm] > [ 1035.437114] ? ttm_bo_init+0x62/0xd0 [ttm] > [ 1035.437190] ? nouveau_bo_invalidate_caches+0x10/0x10 [nouveau] > [ 1035.437226] ? nouveau_bo_new+0x401/0x580 [nouveau] > [ 1035.437262] ? nouveau_bo_invalidate_caches+0x10/0x10 [nouveau] > [ 1035.437298] ? nouveau_gem_new+0x120/0x120 [nouveau] > [ 1035.437334] ? nouveau_gem_new+0x5d/0x120 [nouveau] > [ 1035.437370] ? nouveau_gem_ioctl_new+0x53/0xe0 [nouveau] > [ 1035.437381] ? drm_ioctl_kernel+0x5b/0xb0 [drm] > [ 1035.437392] ? drm_ioctl+0x1c4/0x380 [drm] > [ 1035.437428] ? nouveau_gem_new+0x120/0x120 [nouveau] > [ 1035.437431] ? eventfd_write+0x94/0x2a0 > [ 1035.437467] ? nouveau_drm_ioctl+0x65/0xc0 [nouveau] > [ 1035.437470] ? do_vfs_ioctl+0xa4/0x610 > [ 1035.437471] ? SyS_ioctl+0x74/0x80 > [ 1035.437475] ? do_syscall_64+0x74/0x180 > [ 1035.437478] ? entry_SYSCALL_64_after_hwframe+0x3d/0xa2 I’ll try the iso. Did you get this error with supertuxkart as well, or simply by launching the session? (In reply to Sérgio M. Basto from <a href="show_bug.cgi?id=105173#c9">comment #9</a>) > Complete unresponsive my nvidia , with nouveau or nvidia drive when boot > with kernel 4.15.x last kernel tested : 4.15.4 > > > 01:00.0 VGA compatible controller: NVIDIA Corporation G98M [GeForce 9300M > GS] (rev a1) > > [ 29.876760] nouveau 0000:01:00.0: DRM: EVO timeout It might be a different issue (especially if you get a freeze even when using the NVIDIA driver. Please open a separate bug report; it’s always easier to merge two bug reports than to split one in two.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>