lsusb:
Bus 001 Device 002: ID 05e3:0608
Bus 001 Device 004: ID 0bda:c811 <---------- Este es el adaptador
Bus 004 Device 002: ID 152d:0578
Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0001
Bus 003 Device 001: ID 1d6b:0002
Bus 004 Device 001: ID 1d6b:0003
Bus 001 Device 003: ID 148f:5370

modprobe --verbose 8821cu:
insmod /lib/modules/4.4.35/kernel/drivers/net/wireless/8821cu.ko
modprobe: ERROR: could not insert '8821cu': Cannot allocate memory

cat /proc/meminfo:
MemTotal:         948948 kB
MemFree:          621528 kB
MemAvailable:     656656 kB
Buffers:            4124 kB
Cached:            60668 kB
SwapCached:            0 kB
Active:            89004 kB
Inactive:          43916 kB
Active(anon):      68224 kB
Inactive(anon):     8336 kB
Active(file):      20780 kB
Inactive(file):    35580 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:        432116 kB
HighFree:         296688 kB
LowTotal:         516832 kB
LowFree:          324840 kB
SwapTotal:             0 kB
SwapFree:              0 kB
Dirty:                 0 kB
Writeback:             0 kB
AnonPages:         68132 kB
Mapped:            44944 kB
Shmem:              8436 kB
Slab:              18612 kB
SReclaimable:       7660 kB
SUnreclaim:        10952 kB
KernelStack:        1864 kB
PageTables:         1684 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:      474472 kB
Committed_AS:     667596 kB
VmallocTotal:     507904 kB
VmallocUsed:           0 kB
VmallocChunk:          0 kB
CmaTotal:          77824 kB
CmaFree:               0 kB

dmesg:
<6>usb 1-2: new high-speed USB device number 4 using ehci-platform
vmap allocation for size 2023424 failed: use vmalloc=<size> to increase size.
vmalloc: allocation failure: 2019117 bytes
modprobe: page allocation failure: order:0, mode:0x24000c0
CPU: 3 PID: 5544 Comm: modprobe Tainted: P           O    4.4.35 #1
Hardware name: bigfish
[<c00215f4>] (unwind_backtrace) from [<c001b8e0>] (show_stack+0x20/0x24)
[<c001b8e0>] (show_stack) from [<c03c62b8>] (dump_stack+0x90/0xa4)
[<c03c62b8>] (dump_stack) from [<c00f77a8>] (warn_alloc_failed+0xe4/0x120)
[<c00f77a8>] (warn_alloc_failed) from [<c012821c>] (__vmalloc_node_range+0x184/0x258)
[<c012821c>] (__vmalloc_node_range) from [<c001ca38>] (module_alloc+0x5c/0x64)
[<c001ca38>] (module_alloc) from [<c00b0ad0>] (load_module+0x74c/0x22e8)
[<c00b0ad0>] (load_module) from [<c00b28cc>] (SyS_finit_module+0xa4/0xdc)
[<c00b28cc>] (SyS_finit_module) from [<c0016940>] (ret_fast_syscall+0x0/0x3c)
Mem-Info:
active_anon:16946 inactive_anon:2084 isolated_anon:0
 active_file:4346 inactive_file:9541 isolated_file:0
 unevictable:0 dirty:0 writeback:0 unstable:0
 slab_reclaimable:1919 slab_unreclaimable:2745
 mapped:11192 shmem:2105 pagetables:419 bounce:0
 free:155245 free_pcp:821 free_cma:0
Normal free:324912kB min:8192kB low:10240kB high:12288kB active_anon:34300kB inactive_anon:2668kB active_file:10508kB inactive_file:20736kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:528384kB managed:507112kB mlocked:0kB dirty:0kB writeback:0kB mapped:23448kB shmem:2732kB slab_reclaimable:7676kB slab_unreclaimable:10980kB kernel_stack:1856kB pagetables:840kB unstable:0kB bounce:0kB free_pcp:1532kB local_pcp:628kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no cma_watermark:0kB
lowmem_reserve[]: 0 3375 3375
HighMem free:295696kB min:420kB low:2164kB high:3908kB active_anon:33584kB inactive_anon:5668kB active_file:6876kB inactive_file:17456kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:520192kB managed:432116kB mlocked:0kB dirty:0kB writeback:0kB mapped:21324kB shmem:5688kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:864kB unstable:0kB bounce:0kB free_pcp:1928kB local_pcp:464kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no cma_watermark:0kB
lowmem_reserve[]: 0 0 0
Normal: 54*4kB (UME) 36*8kB (UE) 74*16kB (UME) 310*32kB (UME) 141*64kB (UME) 45*128kB (UME) 14*256kB (ME) 6*512kB (UME) 3*1024kB (M) 1*2048kB (E) 70*4096kB (M) = 324888kB
HighMem: 0*4kB 0*8kB 225*16kB (UM) 188*32kB (UM) 96*64kB (UM) 29*128kB (UM) 13*256kB (M) 5*512kB (UM) 2*1024kB (M) 1*2048kB (M) 65*4096kB (M) = 295696kB
16012 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
262144 pages RAM
130048 pages HighMem/MovableOnly
27337 pages reserved
19456 pages cma reserved
vmap allocation for size 2023424 failed: use vmalloc=<size> to increase size.
vmalloc: allocation failure: 2019117 bytes
modprobe: page allocation failure: order:0, mode:0x24000c0
CPU: 3 PID: 17022 Comm: modprobe Tainted: P           O    4.4.35 #1
Hardware name: bigfish
[<c00215f4>] (unwind_backtrace) from [<c001b8e0>] (show_stack+0x20/0x24)
[<c001b8e0>] (show_stack) from [<c03c62b8>] (dump_stack+0x90/0xa4)
[<c03c62b8>] (dump_stack) from [<c00f77a8>] (warn_alloc_failed+0xe4/0x120)
[<c00f77a8>] (warn_alloc_failed) from [<c012821c>] (__vmalloc_node_range+0x184/0x258)
[<c012821c>] (__vmalloc_node_range) from [<c001ca38>] (module_alloc+0x5c/0x64)
[<c001ca38>] (module_alloc) from [<c00b0ad0>] (load_module+0x74c/0x22e8)
[<c00b0ad0>] (load_module) from [<c00b28cc>] (SyS_finit_module+0xa4/0xdc)
[<c00b28cc>] (SyS_finit_module) from [<c0016940>] (ret_fast_syscall+0x0/0x3c)
Mem-Info:
active_anon:17054 inactive_anon:2084 isolated_anon:0
 active_file:5125 inactive_file:8965 isolated_file:0
 unevictable:0 dirty:3 writeback:0 unstable:0
 slab_reclaimable:1917 slab_unreclaimable:2724
 mapped:11264 shmem:2108 pagetables:422 bounce:0
 free:154819 free_pcp:786 free_cma:0
Normal free:323456kB min:8192kB low:10240kB high:12288kB active_anon:34924kB inactive_anon:2664kB active_file:12848kB inactive_file:19124kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:528384kB managed:507112kB mlocked:0kB dirty:12kB writeback:0kB mapped:23780kB shmem:2732kB slab_reclaimable:7668kB slab_unreclaimable:10896kB kernel_stack:1864kB pagetables:804kB unstable:0kB bounce:0kB free_pcp:1484kB local_pcp:376kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no cma_watermark:0kB
lowmem_reserve[]: 0 3375 3375
HighMem free:295820kB min:420kB low:2164kB high:3908kB active_anon:33292kB inactive_anon:5672kB active_file:7652kB inactive_file:16736kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:520192kB managed:432116kB mlocked:0kB dirty:0kB writeback:0kB mapped:21276kB shmem:5700kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:884kB unstable:0kB bounce:0kB free_pcp:1660kB local_pcp:404kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no cma_watermark:0kB
lowmem_reserve[]: 0 0 0
Normal: 84*4kB (ME) 54*8kB (UME) 78*16kB (UME) 251*32kB (UME) 143*64kB (UME) 45*128kB (UME) 14*256kB (ME) 6*512kB (UME) 3*1024kB (M) 1*2048kB (E) 70*4096kB (M) = 323456kB
HighMem: 181*4kB (UM) 55*8kB (M) 166*16kB (M) 187*32kB (M) 95*64kB (M) 29*128kB (UM) 13*256kB (M) 5*512kB (UM) 2*1024kB (M) 1*2048kB (M) 65*4096kB (M) = 295820kB
16197 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
262144 pages RAM
130048 pages HighMem/MovableOnly
27337 pages reserved
19456 pages cma reserved
vmap allocation for size 2023424 failed: use vmalloc=<size> to increase size.
vmalloc: allocation failure: 2019117 bytes
modprobe: page allocation failure: order:0, mode:0x24000c0
CPU: 3 PID: 17034 Comm: modprobe Tainted: P           O    4.4.35 #1
Hardware name: bigfish
[<c00215f4>] (unwind_backtrace) from [<c001b8e0>] (show_stack+0x20/0x24)
[<c001b8e0>] (show_stack) from [<c03c62b8>] (dump_stack+0x90/0xa4)
[<c03c62b8>] (dump_stack) from [<c00f77a8>] (warn_alloc_failed+0xe4/0x120)
[<c00f77a8>] (warn_alloc_failed) from [<c012821c>] (__vmalloc_node_range+0x184/0x258)
[<c012821c>] (__vmalloc_node_range) from [<c001ca38>] (module_alloc+0x5c/0x64)
[<c001ca38>] (module_alloc) from [<c00b0ad0>] (load_module+0x74c/0x22e8)
[<c00b0ad0>] (load_module) from [<c00b28cc>] (SyS_finit_module+0xa4/0xdc)
[<c00b28cc>] (SyS_finit_module) from [<c0016940>] (ret_fast_syscall+0x0/0x3c)
Mem-Info:
active_anon:17058 inactive_anon:2084 isolated_anon:0
 active_file:5181 inactive_file:8909 isolated_file:0
 unevictable:0 dirty:3 writeback:0 unstable:0
 slab_reclaimable:1917 slab_unreclaimable:2732
 mapped:11264 shmem:2109 pagetables:418 bounce:0
 free:154917 free_pcp:666 free_cma:0
Normal free:323352kB min:8192kB low:10240kB high:12288kB active_anon:34932kB inactive_anon:2664kB active_file:13036kB inactive_file:18936kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:528384kB managed:507112kB mlocked:0kB dirty:12kB writeback:0kB mapped:23780kB shmem:2732kB slab_reclaimable:7668kB slab_unreclaimable:10928kB kernel_stack:1896kB pagetables:800kB unstable:0kB bounce:0kB free_pcp:1276kB local_pcp:156kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no cma_watermark:0kB
lowmem_reserve[]: 0 3375 3375
HighMem free:296316kB min:420kB low:2164kB high:3908kB active_anon:33300kB inactive_anon:5672kB active_file:7688kB inactive_file:16700kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:520192kB managed:432116kB mlocked:0kB dirty:0kB writeback:0kB mapped:21276kB shmem:5704kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:872kB unstable:0kB bounce:0kB free_pcp:1388kB local_pcp:160kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no cma_watermark:0kB
lowmem_reserve[]: 0 0 0
Normal: 154*4kB (ME) 58*8kB (ME) 66*16kB (ME) 246*32kB (ME) 142*64kB (UME) 45*128kB (UME) 14*256kB (ME) 6*512kB (UME) 3*1024kB (M) 1*2048kB (E) 70*4096kB (M) = 323352kB
HighMem: 207*4kB (UM) 56*8kB (M) 168*16kB (UM) 192*32kB (UM) 98*64kB (UM) 29*128kB (UM) 13*256kB (M) 5*512kB (UM) 2*1024kB (M) 1*2048kB (M) 65*4096kB (M) = 296316kB
16198 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap  = 0kB
Total swap = 0kB
262144 pages RAM
130048 pages HighMem/MovableOnly
27337 pages reserved
19456 pages cma reserved