When i915 driver is disabled (i915.modeset=0), Linux falls back to the vesa driver and the laptop screen renders correctly.
When an external monitor is connected via HDMI, the i915 driver renders the external monitor correctly whilst the flickering remains on the laptop screen.
Earlier versions of this laptop model did not experience this problem, but the most recent version does (reported by one other user). I have no authoritative record of the hardware changes between model versions.
System information:
- Architecture and kernel: 4.2.0-994-generic #201507142205 SMP Wed Jul 15 02:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
- Distribution: Ubuntu 15.04
- Laptop model: Lafite 13.3 from www.pcspecialist.co.uk
- Laptop Screen: Chimei N133HSE-EA3
- Display Conenctor: eDP
Manufacturer: CMN Model 1361 Serial Number 0
Made week 7 of 2014
EDID version: 1.4
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 29 cm x 17 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed mode: Clock 138.780 MHz, 293 mm x 165 mm
1920 1966 1996 2080 hborder 0
1080 1082 1086 1112 vborder 0 -hsync -vsync
Detailed mode: Clock 92.520 MHz, 293 mm x 165 mm
1920 1966 1996 2080 hborder 0
1080 1082 1086 1112 vborder 0 -hsync -vsync
ASCII string: CMN
ASCII string: N133HSE-EA3
Checksum: 0xa1
EDID block does NOT conform to EDID 1.3!
Missing name descriptor
Missing monitor ranges
Created attachment 117243
dmesg
Consistently flickering screen when i915 driver is used with the N133HSE-EA3 screen of the Lafite 13.3 laptop. Video here: https:/ /www.youtube. com/watch? v=0ISthkP7L3o
When i915 driver is disabled (i915.modeset=0), Linux falls back to the vesa driver and the laptop screen renders correctly.
When an external monitor is connected via HDMI, the i915 driver renders the external monitor correctly whilst the flickering remains on the laptop screen.
Earlier versions of this laptop model did not experience this problem, but the most recent version does (reported by one other user). I have no authoritative record of the hardware changes between model versions.
System information: t.co.uk
- Architecture and kernel: 4.2.0-994-generic #201507142205 SMP Wed Jul 15 02:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
- Distribution: Ubuntu 15.04
- Laptop model: Lafite 13.3 from www.pcspecialis
- Laptop Screen: Chimei N133HSE-EA3
- Display Conenctor: eDP
$ sudo get-edid | edid-decode
Extracted contents:
header: 00 ff ff ff ff ff ff 00
serial number: 0d ae 61 13 00 00 00 00 07 18
version: 01 04
basic params: a5 1d 11 78 02
chroma info: ce 85 a3 57 4e 9d 26 12 50 54
established: 00 00 00
standard: 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
descriptor 1: 36 36 80 a0 70 38 20 40 2e 1e 24 00 25 a5 10 00 00 18
descriptor 2: 24 24 80 a0 70 38 20 40 2e 1e 24 00 25 a5 10 00 00 18
descriptor 3: 00 00 00 fe 00 43 4d 4e 0a 20 20 20 20 20 20 20 20 20
descriptor 4: 00 00 00 fe 00 4e 31 33 33 48 53 45 2d 45 41 33 0a 20
extensions: 00
checksum: a1
Manufacturer: CMN Model 1361 Serial Number 0
-hsync -vsync
-hsync -vsync
Made week 7 of 2014
EDID version: 1.4
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 29 cm x 17 cm
Gamma: 2.20
Supported color formats: RGB 4:4:4
First detailed timing is preferred timing
Established timings supported:
Standard timings supported:
Detailed mode: Clock 138.780 MHz, 293 mm x 165 mm
1920 1966 1996 2080 hborder 0
1080 1082 1086 1112 vborder 0
Detailed mode: Clock 92.520 MHz, 293 mm x 165 mm
1920 1966 1996 2080 hborder 0
1080 1082 1086 1112 vborder 0
ASCII string: CMN
ASCII string: N133HSE-EA3
Checksum: 0xa1
EDID block does NOT conform to EDID 1.3!
Missing name descriptor
Missing monitor ranges
$ sudo lshw -c video
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0 b1000000- b1ffffff memory: c0000000- cfffffff ioport: 4000(size= 64)
*-display
description: VGA compatible controller
product: Broadwell-U Integrated Graphics
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
resources: irq:50 memory:
$ glxinfo | grep -i vendor
server glx vendor string: SGI
client glx vendor string: Mesa Project and SGI
OpenGL vendor string: Intel Open Source Technology Center
$ glxinfo | grep -i render MESA_multithrea d_makecurrent, GLX_MESA_ query_renderer, MESA_multithrea d_makecurrent, GLX_MESA_ query_renderer, ARB_conditional _render_ inverted, GL_ARB_ conservative_ depth, MESA_texture_ signed_ rgba, GL_NV_condition al_render, GL_NV_depth_clamp, ARB_conditional _render_ inverted, GL_ARB_ conservative_ depth, NV_conditional_ render, GL_NV_depth_clamp, GL_NV_light_ max_exponent, OES_element_ index_uint, GL_OES_ fbo_render_ mipmap,
direct rendering: Yes
GLX_
GLX_
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2)
GL_
GL_
GL_
GL_
GL_