OK, I have to correct myself. If you do a fresh start into 10.10, then start one instance of evince (might be every other program), then hibernate: everything works as supposed.

Hibernation stops working if you start more programs, like firefox+ooo+gimp and some other memory hungry ones.

In /var/log/syslog, I found something that may either be connected and helpful or not. I will post the snippet here and the other files as attachment in the next comment (launchpad responds with error 414 (url to long), when i try to attach to this comment).

###SNIPPET starts ...####

Oct  7 15:47:30 lenubuntu kernel: [    0.072000] ACPI: EC: Look up EC in DSDT
Oct  7 15:47:30 lenubuntu kernel: [    0.075846] ACPI: BIOS _OSI(Linux) query ignored
Oct  7 15:47:30 lenubuntu kernel: [    0.078111] ------------[ cut here ]------------
Oct  7 15:47:30 lenubuntu kernel: [    0.078119] WARNING: at /build/buildd/linux-2.6.35/mm/page_alloc.c:1968 __alloc_pages_slowpath+0x442/0x4b0()
Oct  7 15:47:30 lenubuntu kernel: [    0.078121] Hardware name: 4151/200            
Oct  7 15:47:30 lenubuntu kernel: [    0.078123] Modules linked in:
Oct  7 15:47:30 lenubuntu kernel: [    0.078126] Pid: 1, comm: swapper Not tainted 2.6.35-22-generic #33-Ubuntu
Oct  7 15:47:30 lenubuntu kernel: [    0.078128] Call Trace:
Oct  7 15:47:30 lenubuntu kernel: [    0.078134]  [<c014ac52>] warn_slowpath_common+0x72/0xa0
Oct  7 15:47:30 lenubuntu kernel: [    0.078137]  [<c01dfb52>] ? __alloc_pages_slowpath+0x442/0x4b0
Oct  7 15:47:30 lenubuntu kernel: [    0.078140]  [<c01dfb52>] ? __alloc_pages_slowpath+0x442/0x4b0
Oct  7 15:47:30 lenubuntu kernel: [    0.078143]  [<c014aca2>] warn_slowpath_null+0x22/0x30
Oct  7 15:47:30 lenubuntu kernel: [    0.078146]  [<c01dfb52>] __alloc_pages_slowpath+0x442/0x4b0
Oct  7 15:47:30 lenubuntu kernel: [    0.078150]  [<c01df3e7>] ? get_page_from_freelist+0x247/0x330
Oct  7 15:47:30 lenubuntu kernel: [    0.078153]  [<c03b0d35>] ? acpi_ns_create_node+0x34/0x43
Oct  7 15:47:30 lenubuntu kernel: [    0.078157]  [<c01dfd2f>] __alloc_pages_nodemask+0x16f/0x1c0
Oct  7 15:47:30 lenubuntu kernel: [    0.078160]  [<c01dfd9c>] __get_free_pages+0x1c/0x30
Oct  7 15:47:30 lenubuntu kernel: [    0.078164]  [<c020cdc6>] __kmalloc+0x146/0x170
Oct  7 15:47:30 lenubuntu kernel: [    0.078168]  [<c03a8f08>] ? acpi_os_allocate+0x2a/0x2c
Oct  7 15:47:30 lenubuntu kernel: [    0.078171]  [<c03ba27e>] ? acpi_ut_add_reference+0x1d/0x20
Oct  7 15:47:30 lenubuntu kernel: [    0.078175]  [<c03a8f08>] acpi_os_allocate+0x2a/0x2c
Oct  7 15:47:30 lenubuntu kernel: [    0.078177]  [<c03a8fd8>] acpi_ex_load_op+0xce/0x25e
Oct  7 15:47:30 lenubuntu kernel: [    0.078180]  [<c03a440d>] ? acpi_ds_create_operands+0x74/0xc6
Oct  7 15:47:30 lenubuntu kernel: [    0.078184]  [<c03ab764>] acpi_ex_opcode_1A_1T_0R+0x29/0x55
Oct  7 15:47:30 lenubuntu kernel: [    0.078186]  [<c03a3114>] acpi_ds_exec_end_op+0xde/0x392
Oct  7 15:47:30 lenubuntu kernel: [    0.078190]  [<c03b4e5c>] ? acpi_ps_complete_op+0x1f7/0x206
Oct  7 15:47:30 lenubuntu kernel: [    0.078193]  [<c03b51dc>] acpi_ps_parse_loop+0x267/0x2c3
Oct  7 15:47:30 lenubuntu kernel: [    0.078196]  [<c03b42e5>] acpi_ps_parse_aml+0x8c/0x27e
Oct  7 15:47:30 lenubuntu kernel: [    0.078199]  [<c03b5858>] acpi_ps_execute_method+0x1a3/0x25b
Oct  7 15:47:30 lenubuntu kernel: [    0.078201]  [<c03b0e15>] acpi_ns_evaluate+0xd1/0x192
Oct  7 15:47:30 lenubuntu kernel: [    0.078204]  [<c03b9edc>] ? acpi_ut_copy_eobject_to_iobject+0x89/0x95
Oct  7 15:47:30 lenubuntu kernel: [    0.078207]  [<c03b080d>] ? acpi_os_allocate_zeroed+0x2d/0x2f
Oct  7 15:47:30 lenubuntu kernel: [    0.078210]  [<c03b08e5>] acpi_evaluate_object+0xd6/0x1c5
Oct  7 15:47:30 lenubuntu kernel: [    0.078213]  [<c039c29d>] ? acpi_processor_alloc_pdc+0xb8/0x169
Oct  7 15:47:30 lenubuntu kernel: [    0.078216]  [<c039c3b0>] acpi_processor_set_pdc+0x62/0x81
Oct  7 15:47:30 lenubuntu kernel: [    0.078219]  [<c039c3ea>] early_init_pdc+0x1b/0x21
Oct  7 15:47:30 lenubuntu kernel: [    0.078222]  [<c03b2702>] acpi_ns_walk_namespace+0xac/0x162
Oct  7 15:47:30 lenubuntu kernel: [    0.078225]  [<c039c3cf>] ? early_init_pdc+0x0/0x21
Oct  7 15:47:30 lenubuntu kernel: [    0.078228]  [<c03b07b9>] acpi_walk_namespace+0x79/0xa0
Oct  7 15:47:30 lenubuntu kernel: [    0.078230]  [<c039c3cf>] ? early_init_pdc+0x0/0x21
Oct  7 15:47:30 lenubuntu kernel: [    0.078234]  [<c0841d1f>] acpi_early_processor_set_pdc+0x3f/0x41
Oct  7 15:47:30 lenubuntu kernel: [    0.078237]  [<c039c3cf>] ? early_init_pdc+0x0/0x21
Oct  7 15:47:30 lenubuntu kernel: [    0.078240]  [<c08419a5>] acpi_bus_init+0xa8/0x1cd
Oct  7 15:47:30 lenubuntu kernel: [    0.078243]  [<c03521dc>] ? kobject_add+0x2c/0x60
Oct  7 15:47:30 lenubuntu kernel: [    0.078246]  [<c0841b31>] acpi_init+0x67/0x10c
Oct  7 15:47:30 lenubuntu kernel: [    0.078250]  [<c083fc74>] ? fbmem_init+0x6c/0x96
Oct  7 15:47:30 lenubuntu kernel: [    0.078253]  [<c0101132>] do_one_initcall+0x32/0x1a0
Oct  7 15:47:30 lenubuntu kernel: [    0.078257]  [<c01a7f64>] ? irq_to_desc+0x14/0x20
Oct  7 15:47:30 lenubuntu kernel: [    0.078259]  [<c0841aca>] ? acpi_init+0x0/0x10c
Oct  7 15:47:30 lenubuntu kernel: [    0.078263]  [<c08192c9>] do_basic_setup+0x47/0x57
Oct  7 15:47:30 lenubuntu kernel: [    0.078265]  [<c08193de>] kernel_init+0x105/0x19d
Oct  7 15:47:30 lenubuntu kernel: [    0.078268]  [<c08192d9>] ? kernel_init+0x0/0x19d
Oct  7 15:47:30 lenubuntu kernel: [    0.078271]  [<c010363e>] kernel_thread_helper+0x6/0x10
Oct  7 15:47:30 lenubuntu kernel: [    0.078277] ---[ end trace a7919e7f17c0a725 ]---
Oct  7 15:47:30 lenubuntu kernel: [    0.078280] ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU1.APCT] (Node f701e480), AE_NO_MEMORY
Oct  7 15:47:30 lenubuntu kernel: [    0.078309] ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU1.GCAP] (Node f701e468), AE_NO_MEMORY
Oct  7 15:47:30 lenubuntu kernel: [    0.078335] ACPI Error (psparse-0537): Method parse/execution failed [\_PR_.CPU1._PDC] (Node f701e438), AE_NO_MEMORY
Oct  7 15:47:30 lenubuntu kernel: [    0.079343] ACPI: Interpreter enabled
Oct  7 15:47:30 lenubuntu kernel: [    0.079346] ACPI: (supports S0 S3 S4 S5)
Oct  7 15:47:30 lenubuntu kernel: [    0.079369] ACPI: Using IOAPIC for interrupt routing
Oct  7 15:47:30 lenubuntu kernel: [    0.123578] ACPI: EC: GPE = 0x1c, I/O: command/status = 0x66, data = 0x62
Oct  7 15:47:30 lenubuntu kernel: [    0.123986] ACPI: No dock devices found.
Oct  7 15:47:30 lenubuntu kernel: [    0.123990] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
Oct  7 15:47:30 lenubuntu kernel: [    0.124575] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])