Rui Salvaterra wrote: > Hi, > > > The machine (Atom 330 CPU, ION chipset, GeForce 9400M graphics) works, > but graphics are dead. Dmesg shows the following (Linux 6.16-rc5): > > [ 34.408331] BUG: kernel NULL pointer dereference, address: 0000000000000000 > [ 34.408351] #PF: supervisor instruction fetch in kernel mode > [ 34.408358] #PF: error_code(0x0010) - not-present page > [ 34.408364] PGD 0 P4D 0 > [ 34.408373] Oops: Oops: 0010 [#1] SMP > [ 34.408383] CPU: 2 UID: 0 PID: 583 Comm: Xorg Not tainted > 6.16.0-rc5-dbg+ #187 PREEMPTLAZY > [ 34.408393] Hardware name: To Be Filled By O.E.M. To Be Filled By > O.E.M./To be filled by O.E.M., BIOS 080015 08/13/2009 > [ 34.408399] RIP: 0010:0x0 > [ 34.408414] Code: Unable to access opcode bytes at 0xffffffffffffffd6. > [ 34.408420] RSP: 0018:ffff88800378bc08 EFLAGS: 00010202 > [ 34.408428] RAX: ffffffff82071c60 RBX: ffff888008e6f000 RCX: > 0000000000000978 > [ 34.408434] RDX: 0000000000000020 RSI: 0000000000000002 RDI: > ffff888008e6f000 > [ 34.408440] RBP: ffff88800378bd18 R08: 0000000000000000 R09: > 00000000000003ff > [ 34.408445] R10: 0000000000000000 R11: ffff88800378bcc0 R12: > ffff88800378bdb8 > [ 34.408451] R13: ffff888007dad9c0 R14: ffff888004285680 R15: > ffff888007e671c0 > [ 34.408457] FS: 00007f2cc7b2eb00(0000) GS:ffff888149ecf000(0000) > knlGS:0000000000000000 > [ 34.408464] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 34.408469] CR2: ffffffffffffffd6 CR3: 0000000008a08000 CR4: > 00000000000006f0 > [ 34.408475] Call Trace: > [ 34.408482] <TASK> > [ 34.408486] nouveau_gem_ioctl_pushbuf+0x10d8/0x1240 > [ 34.408504] ? nouveau_gem_ioctl_new+0x160/0x160 > [ 34.408513] drm_ioctl_kernel+0x7a/0xe0 > [ 34.408524] drm_ioctl+0x1ef/0x490 > [ 34.408532] ? nouveau_gem_ioctl_new+0x160/0x160 > [ 34.408541] ? __handle_mm_fault+0xff2/0x1510 > [ 34.408552] nouveau_drm_ioctl+0x50/0xa0 > [ 34.408560] __x64_sys_ioctl+0x4be/0xa90 > [ 34.408570] ? handle_mm_fault+0xb5/0x1a0 > [ 34.408578] ? lock_mm_and_find_vma+0x34/0x170 > [ 34.408587] do_syscall_64+0x51/0x1d0 > [ 34.408596] entry_SYSCALL_64_after_hwframe+0x4b/0x53 > [ 34.408605] RIP: 0033:0x7f2cc7d2f9dd > [ 34.408612] Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 > c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 > 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 > 00 00 > [ 34.408620] RSP: 002b:00007fff6a501ee0 EFLAGS: 00000246 ORIG_RAX: > 0000000000000010 > [ 34.408628] RAX: ffffffffffffffda RBX: 000055c7792b3f78 RCX: > 00007f2cc7d2f9dd > [ 34.408634] RDX: 00007fff6a501fa0 RSI: 00000000c0406481 RDI: > 0000000000000011 > [ 34.408640] RBP: 00007fff6a501f30 R08: 0000000000000978 R09: > 000055c7792af740 > [ 34.408645] R10: 0000000000000002 R11: 0000000000000246 R12: > 00007fff6a501fa0 > [ 34.408651] R13: 00000000c0406481 R14: 0000000000000011 R15: > 000055c7792ac700 > [ 34.408660] </TASK> > [ 34.408664] Modules linked in: > [ 34.408671] CR2: 0000000000000000 > [ 34.408678] ---[ end trace 0000000000000000 ]--- > [ 34.408682] RIP: 0010:0x0 > [ 34.408691] Code: Unable to access opcode bytes at 0xffffffffffffffd6. > [ 34.408696] RSP: 0018:ffff88800378bc08 EFLAGS: 00010202 > [ 34.408703] RAX: ffffffff82071c60 RBX: ffff888008e6f000 RCX: > 0000000000000978 > [ 34.408709] RDX: 0000000000000020 RSI: 0000000000000002 RDI: > ffff888008e6f000 > [ 34.408715] RBP: ffff88800378bd18 R08: 0000000000000000 R09: > 00000000000003ff > [ 34.408720] R10: 0000000000000000 R11: ffff88800378bcc0 R12: > ffff88800378bdb8 > [ 34.408726] R13: ffff888007dad9c0 R14: ffff888004285680 R15: > ffff888007e671c0 > [ 34.408731] FS: 00007f2cc7b2eb00(0000) GS:ffff888149ecf000(0000) > knlGS:0000000000000000 > [ 34.408738] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 34.408743] CR2: ffffffffffffffd6 CR3: 0000000008a08000 CR4: > 00000000000006f0 > [ 34.408750] note: Xorg[583] exited with irqs disabled > > Unfortunately, bisecting is not feasible for me.
That looks pretty similar to the problem I posted (https://lore.kernel.org/lkml/aeljio9_se6ta...@audible.transient.net/) that I bisected to 862450a85b85 ("drm/nouveau/gf100-: track chan progress with non-WFI semaphore release"). It still reverts cleanly as of v6.16-rc5 so you might want to give that a shot. -- Jamie Heilman http://audible.transient.net/~jamie/
