I've got the same problem. Here's my log:
LITE-ON DVDRW LH-20A1S 9L08 (ATA)
Current Profile: DVD-R
Disc Information:
Status: Incomplete
Erasable: No
Sessions: 1
Free Sectors: 464,608
Free Space: 951,517,184 bytes
Free Time: 103:16:58 (MM:SS:FF)
Supported Write Speeds: 2x, 4x, 6x, 8x, 12x, 16x, 18x, 20x
Pre-recorded Information:
Manufacturer ID: SONY16D1
Physical Format Information (Last Recorded):
Disc ID: 0@P-!-00
Book Type: DVD-R
Part Version: 5
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 1
Track Path: Parallel Track Path (PTP)
Linear Density: 0.267 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 2,481,965
Last Physical Sector in Layer 0: 0
Performance (Write Speed):
Descriptor 1...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 2,770 KB/s (2x)
Descriptor 2...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 5,540 KB/s (4x)
Descriptor 3...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 8,310 KB/s (6x)
Descriptor 4...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 11,080 KB/s (8x)
Descriptor 5...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 16,620 KB/s (12x)
Descriptor 6...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 22,160 KB/s (16x)
Descriptor 7...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 24,930 KB/s (18x)
Descriptor 8...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 0 (0x00000000)
-> RS: 8,864 KB/s (6.6x) - WS: 27,700 KB/s (20x)