Looks like the RAM size is correctly detected:
[ 10.572891] nouveau [ DEVICE][0000:03:09.0] BOOT0 : 0x04a100a1
[ 10.572897] nouveau [ DEVICE][0000:03:09.0] Chipset: NV44A (NV4A)
[ 10.572903] nouveau [ DEVICE][0000:03:09.0] Family : NV40
[ 10.579195] nouveau [ VBIOS][0000:03:09.0] checking PRAMIN for image...
[ 10.579208] nouveau [ VBIOS][0000:03:09.0] ... signature not found
[ 10.579213] nouveau [ VBIOS][0000:03:09.0] checking PROM for image...
[ 10.900540] nouveau [ VBIOS][0000:03:09.0] ... appears to be valid
[ 10.900544] nouveau [ VBIOS][0000:03:09.0] using image from PROM
[ 10.900760] nouveau [ VBIOS][0000:03:09.0] BIT signature found
[ 10.900767] nouveau [ VBIOS][0000:03:09.0] version 05.44.a2.10.01
[ 10.913241] nouveau [ DEVINIT][0000:03:09.0] adaptor not initialised
[ 10.913253] nouveau [ VBIOS][0000:03:09.0] running init tables
[ 10.931444] nouveau [ PFB][0000:03:09.0] RAM type: DDR2
[ 10.931448] nouveau [ PFB][0000:03:09.0] RAM size: 256 MiB
Looks like the RAM size is correctly detected: [0000:03: 09.0] BOOT0 : 0x04a100a1 [0000:03: 09.0] Chipset: NV44A (NV4A) [0000:03: 09.0] Family : NV40 0000:03: 09.0] checking PRAMIN for image... 0000:03: 09.0] ... signature not found 0000:03: 09.0] checking PROM for image... 0000:03: 09.0] ... appears to be valid 0000:03: 09.0] using image from PROM 0000:03: 09.0] BIT signature found 0000:03: 09.0] version 05.44.a2.10.01 [0000:03: 09.0] adaptor not initialised 0000:03: 09.0] running init tables
[ 10.572891] nouveau [ DEVICE]
[ 10.572897] nouveau [ DEVICE]
[ 10.572903] nouveau [ DEVICE]
[ 10.579195] nouveau [ VBIOS][
[ 10.579208] nouveau [ VBIOS][
[ 10.579213] nouveau [ VBIOS][
[ 10.900540] nouveau [ VBIOS][
[ 10.900544] nouveau [ VBIOS][
[ 10.900760] nouveau [ VBIOS][
[ 10.900767] nouveau [ VBIOS][
[ 10.913241] nouveau [ DEVINIT]
[ 10.913253] nouveau [ VBIOS][
[ 10.931444] nouveau [ PFB][0000:03:09.0] RAM type: DDR2
[ 10.931448] nouveau [ PFB][0000:03:09.0] RAM size: 256 MiB
You can use HWE stack for newer kernel and newer Xorg: /wiki.ubuntu. com/Kernel/ LTSEnablementSt ack#Ubuntu_ 14.04_LTS_ -_Trusty_ Tahr
https:/
[ 10.931451] nouveau [ PFB][0000:03:09.0] ZCOMP: 0 tags