Hi,
I have an old usb 2.0 displaylink device with hdmi, also tried with different displays and have the same behaviour and outputs, my session is also crashes, when I disconnect the device, and drops me to login screen.
I know I should use fbl, but before I knew I have tried EVDI, and it doesn't work as well, but I had not all zeros invalid EDID
Code:
kernel: [ 1002.378434] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is184
kernel: [ 1002.378438] Raw EDID:
kernel: [ 1002.378440] 00 ff ff ff ff ff ff 00 41 2f 00 00 01 01 01 01
kernel: [ 1002.378442] 00 15 01 03 80 00 00 78 0a da ff a3 58 4a a2 29
kernel: [ 1002.378443] 17 49 4b 00 00 00 01 01 01 01 01 01 01 01 01 01
kernel: [ 1002.378444] 01 01 01 01 01 01 01 1d 00 bc 52 d0 1e 20 b8 28
kernel: [ 1002.378446] 55 40 ba 88 21 00 00 1e 01 1d 00 72 51 d0 1e 20
kernel: [ 1002.378447] 6e 28 55 00 ba 88 21 00 00 1e 00 00 00 00 00 00
kernel: [ 1002.378448] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
kernel: [ 1002.378450] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
kernel: [ 1002.378453] udl 2-3.1:1.0: DVI-I-2: EDID invalid.
kernel: [ 1002.379077] udl 2-3.1:1.0: fb2: udldrmfb frame buffer device
Without evdi:
Code:
[ 2617.838969] usb 2-2.1: new high-speed USB device number 19 using xhci_hcd
[ 2617.946762] usb 2-2.1: New USB device found, idVendor=17e9, idProduct=019d
[ 2617.946766] usb 2-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2617.946769] usb 2-2.1: Product: USB TO HDMI
[ 2617.946771] usb 2-2.1: Manufacturer: DisplayLink
[ 2617.946773] usb 2-2.1: SerialNumber: 003142
[ 2617.948083] [drm] vendor descriptor length:23 data:23 5f 01 00 21 00 04 04 07 00 01
[ 2617.986830] EDID block is all zeroes
[ 2617.986837] udl 2-2.1:1.0: DVI-I-1: EDID invalid.
[ 2617.987493] udl 2-2.1:1.0: fb1: udldrmfb frame buffer device
[ 2617.987497] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 2617.987498] [drm] No driver support for vblank timestamp query.
[ 2617.987500] [drm] Initialized udl on minor 1
[ 2618.074972] usb 2-2.2: new full-speed USB device number 20 using xhci_hcd
[ 2618.180003] usb 2-2.2: New USB device found, idVendor=0d8c, idProduct=000c
[ 2618.180008] usb 2-2.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[ 2618.180010] usb 2-2.2: Product: C-Media USB Headphone Set
[ 2618.184149] input: C-Media USB Headphone Set as /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2.2/2-2.2:1.2/0003:0D8C:000C.0007/input/input25
[ 2618.239182] hid-generic 0003:0D8C:000C.0007: input,hidraw2: USB HID v1.00 Device [C-Media USB Headphone Set ] on usb-0000:00:14.0-2.2/input2
[ 2619.091410] EDID block is all zeroes
[ 2619.091431] udl 2-2.1:1.0: DVI-I-1: EDID invalid.
[ 2619.131242] EDID block is all zeroes
[ 2619.131247] udl 2-2.1:1.0: DVI-I-1: EDID invalid.
[ 2655.928327] [drm] write mode info 153
[ 2656.932604] [drm] wait for urb interrupted: ffffffc2 available: 0
...
[ 2870.401817] [drm] wait for urb interrupted: ffffffc2 available: 0
[ 2871.401847] [drm] wait for urb interrupted: ffffffc2 available: 0
[ 2872.401860] [drm] wait for urb interrupted: ffffffc2 available: 0
[ 2872.677582] [drm:udl_urb_completion [udl]] *ERROR* udl_urb_completion - nonzero write bulk status received: -71
[ 2872.678194] usb 2-2: USB disconnect, device number 18
[ 2872.678200] usb 2-2.1: USB disconnect, device number 19
[ 2872.681277] usb 2-2.2: USB disconnect, device number 20
[ 2873.307596] konsole[7540]: segfault at 7f8cffaa6608 ip 00007f8d0ec5c371 sp 00007ffed4c340b0 error 4 in libQt5Core.so.5.5.1[7f8d0e99b000+4c5000]
[ 2874.301959] [drm] wait for urb interrupted: ffffffc2 available: 4
[ 2875.201910] usb 1-1.6: reset full-speed USB device number 5 using ehci-pci
Code:
$ lsmod |grep udl
udl 32768 0
drm_kms_helper 147456 2 udl,i915
drm 364544 7 udl,i915,drm_kms_helper
$ uname -a
Linux grey 4.4.0-38-generic #57-Ubuntu SMP Tue Sep 6 15:42:33 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux