thor gphoto # gphoto2 --camera "USB PTP Class Camera" --port usb: --set-config capture=on
 value on, t 1
No event yet, we'll try later.
thor gphoto # gphoto2 --camera "USB PTP Class Camera" --port usb: --summary
Camera summary:
Model: Canon PowerShot A70
  device version: 01.0001
  serial number:  (null)
Vendor extension ID: 0x0000000b
Vendor extension description: (null)

Capture Formats: JPEG
Display Formats: Association/Directory, JPEG, MS AVI, MS Wave, Unknown(b101), Script

Device Capabilities:
        File Download, File Deletion, File Upload
        Generic Image Capture, No Open Capture, Canon Capture

Storage Devices Summary:
store_80000001:
        StorageDescription: None
        VolumeLabel: V
        Storage Type: Builtin RAM
        Filesystemtype: Unknown: 0x8001

        Access Capability: Read-Write
        Maximum Capability: 0 (0 MB)
        Free Space (Bytes): 0 (0 MB)
        Free Space (Images): -1

Device Property Summary:
Beep Mode(0xd001):(readwrite) (type=0x2) Enumeration [0,1] value: 1
Property 0xd002:(read only) (type=0x4) Enumeration [0,1,2,3,4,5] value: 2
Viewfinder Mode(0xd003):(read only) (type=0x6) Enumeration [0,1,2,3] value: 1
Property 0xd005:(read only) (type=0x2) 32
Image Quality(0xd006):(readwrite) (type=0x2) Enumeration [2,3,5] value: 3
Property 0xd007:(readwrite) (type=0x2) Enumeration [1] value: 1
Image Size(0xd008):(readwrite) (type=0x2) Enumeration [0,1,3,2] value: 0
Property 0xd009:(read only) (type=0x4) 100
Flash Mode(0xd00a):(readwrite) (type=0x2) Enumeration [0,1,2,5,6] value: 0
Property 0xd00b:(read only) (type=0x2) 0
Shooting Mode(0xd00c):(readwrite) (type=0x2) Enumeration [1,2,3,4] value: 1
Property 0xd00e:(read only) (type=0x2) 0
Property 0xd00f:(read only) (type=0x2) 0
Metering Mode(0xd010):(readwrite) (type=0x2) Enumeration [0,1,3] value: 3
AF Distance(0xd011):(readwrite) (type=0x2) Enumeration [1,3] value: 1
Focusing Point(0xd012):(readwrite) (type=0x4) Enumeration [12291,12289] value: 12289
White Balance(0xd013):(readwrite) (type=0x2) Enumeration [0,1,2,3,4,7,6] value: 0
Property 0xd015:(read only) (type=0x2) 0
Property 0xd017:(readwrite) (type=0x1) Enumeration [0] value: 0
Property 0xd018:(readwrite) (type=0x1) Enumeration [0] value: 0
Property 0xd019:(readwrite) (type=0x1) Enumeration [0] value: 0
ISO Speed(0xd01c):(readwrite) (type=0x4) Enumeration [64,72,80,88,0] value: 64
Aperture(0xd01d):(readwrite) (type=0x4) Enumeration [] value: 40
ShutterSpeed(0xd01e):(readwrite) (type=0x4) Enumeration [] value: 112
Exposure Compensation(0xd01f):(readwrite) (type=0x2) Enumeration [8,11,13,16,19,21,24,27,29,32,35,37,40] value: 24
Property 0xd023:(read only) (type=0x4) 32
Property 0xd024:(read only) (type=0x4) 56
Property 0xd025:(read only) (type=0x4) 173
Property 0xd026:(read only) (type=0x4) 519
Property 0xd027:(read only) (type=0x4) 173
Property 0xd028:(read only) (type=0x4) 32
Property 0xd029:(readwrite) (type=0x4) Enumeration [1,2,3] value: 3
Zoom(0xd02a):(readwrite) (type=0x4) Range [0 - 11, step 1] value: 0
Size Quality Mode(0xd02c):(read only) (type=0x4006) Enumeration [
        a[6] 1536,2048,1,0,0,0,
        a[6] 1536,2048,6,0,0,0,
        a[6] 1536,2048,11,0,0,0,
        a[6] 1200,1600,2,0,0,0,
        a[6] 1200,1600,7,0,0,0,
        a[6] 1200,1600,12,0,0,0,
        a[6] 768,1024,3,0,0,0,
        a[6] 768,1024,8,0,0,0,
        a[6] 768,1024,13,0,0,0,
        a[6] 480,640,5,0,0,0,
        a[6] 480,640,10,0,0,0,
        a[6] 480,640,15,0,0,0
        ] value: a[6] 1536,2048,6,0,0,0
Property 0xd02d:(read only) (type=0x4006) Enumeration [
        a[4] 119,0,159,0
        ] value: a[4] 119,0,159,0
Property 0xd02e:(read only) (type=0x6) 20480
Property 0xd02f:(read only) (type=0x6) 5120
Property 0xd030:(read only) (type=0x6) 256
Firmware Version(0xd031):(read only) (type=0x6) 33554432
Camera Model(0xd032):(read only) (type=0xffff) 'Canon PowerShot A70'
Camera Owner(0xd033):(readwrite) (type=0x4002) a[8] 65,108,101,115,115,105,111,0
UNIX Time(0xd034):(readwrite) (type=0x6) 1173433887
Property 0xd036:(readwrite) (type=0x2) Enumeration [1,2,3] value: 3
Property 0xd037:(read only) (type=0x4) 0
Property 0xd038:(read only) (type=0x3) 32
Digital Zoom Magnification(0xd039):(read only) (type=0x4) 2048
Property 0xd03a:(read only) (type=0x4) 0
Property 0xd03b:(read only) (type=0x4) 0
Property 0xd03c:(read only) (type=0x4) 56
Property 0xd03d:(read only) (type=0x4) 7
Property 0xd03e:(read only) (type=0x4) 519
Property 0xd03f:(read only) (type=0x4) 640
Photo Effect(0xd040):(readwrite) (type=0x4) Enumeration [0,1,2,3,4,5] value: 0
Assist Light(0xd041):(readwrite) (type=0x4) Enumeration [0,1] value: 1
Property 0xd042:(readwrite) (type=0x4) Enumeration [] value: 65535
Property 0xd045:(readwrite) (type=0x4) Enumeration [1,2,3,4,5,6,7] value: 4
Property 0xd046:(read only) (type=0x4) 257
Property 0xd047:(read only) (type=0x4) 0
Property 0xd048:(read only) (type=0x4006) a[16] 1640448,1026048,583680,0,254976,914432,571392,327680,0,153600,455680,284672,174080,0,86016,2097152
Property 0xd049:(read only) (type=0x6) 19202048

thor gphoto # gphoto2 --camera "USB PTP Class Camera" --port usb: --get-config aperture

*** Error ***
ptp2/usb_getresp: request code 0x1002 getting resp error 0x02ff
Label: Aperture
Type: RADIO
Current: 4.0
Choice: 0 auto
Choice: 1 2.8
Choice: 2 3.2
Choice: 3 3.5
Choice: 4 4.0
Choice: 5 4.5
Choice: 6 5
Choice: 7 5.6
Choice: 8 6.3
Choice: 9 7.1
Choice: 10 8.0

thor gphoto # gphoto2 --camera "USB PTP Class Camera" --port usb: --get-config shutterspeed

*** Error ***
ptp2/usb_getresp: request code 0x1002 getting resp error 0x02ff
Label: Shutter Speed
Type: RADIO
Current: 1/125
Choice: 0 auto
Choice: 1 15"
Choice: 2 13"
Choice: 3 10"
Choice: 4 8"
Choice: 5 6"
Choice: 6 5"
Choice: 7 4"
Choice: 8 3"2
Choice: 9 2"5
Choice: 10 2"
Choice: 11 1"6
Choice: 12 1"3
Choice: 13 1"
Choice: 14 0"8
Choice: 15 0"6
Choice: 16 0"5
Choice: 17 0"4
Choice: 18 0"3
Choice: 19 1/4
Choice: 20 1/5
Choice: 21 1/6
Choice: 22 1/8
Choice: 23 1/10
Choice: 24 1/13
Choice: 25 1/15
Choice: 26 1/20
Choice: 27 1/25
Choice: 28 1/30
Choice: 29 1/40
Choice: 30 1/50
Choice: 31 1/60
Choice: 32 1/80
Choice: 33 1/100
Choice: 34 1/125
Choice: 35 1/160
Choice: 36 1/200
Choice: 37 1/250
Choice: 38 1/320
Choice: 39 1/400
Choice: 40 1/500
Choice: 41 1/640
Choice: 42 1/800
Choice: 43 1/1000
Choice: 44 1/1250
Choice: 45 1/1600
Choice: 46 1/2000