en tout cas dans Chromium j'ai aussi désactivé l'accélération matérielle
Dans la barre d'adresse
chrome://gpu/
rGaphics Feature Status
Canvas: Software only, hardware acceleration unavailable
CheckerImaging: Disabled
Flash: Software only. Hardware acceleration disabled
Flash Stage3D: Software only. Hardware acceleration disabled
Flash Stage3D Baseline profile: Software only. Hardware acceleration disabled
Compositing: Software only. Hardware acceleration disabled
Multiple Raster Threads: Disabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Software only. Hardware acceleration disabled
Surface Synchronization: Enabled
Video Decode: Software only. Hardware acceleration disabled
WebGL: Software only, hardware acceleration unavailable
WebGL2: Software only, hardware acceleration unavailable
Problems Detected
Raster is using a single thread.
Disabled Features: multiple_raster_threads
Native GpuMemoryBuffers have been disabled, either via about:flags or command line.
Disabled Features: native_gpu_memory_buffers
Checker-imaging has been disabled via finch trial or the command line.
Disabled Features: checker_imaging
Version Information
Data exported 2018-05-31T09:29:02.875Z
Chrome version Chrome/66.0.3359.117
Operating system Linux 4.16.0-1-amd64
Software rendering list URL https://chromium.googlesource.com/chromium/src/+/1634af79e3bf0d6f0178a5fdb8829b059ead4b26/gpu/config/software_rendering_list.json
Driver bug list URL https://chromium.googlesource.com/chromium/src/+/1634af79e3bf0d6f0178a5fdb8829b059ead4b26/gpu/config/gpu_driver_bug_list.json
ANGLE commit id unknown hash
2D graphics backend Skia/66 773868fdade5f9f0e7697e6d09c9bd80aaa9b402-
Command Line /usr/lib/chromium/chromium --show-component-extension-options --ignore-gpu-blacklist --no-default-browser-check --disable-pings --media-router=0 --enable-remote-extensions --incognito --ppapi-flash-path=/usr/lib/adobe-flashplugin/libpepflashplayer.so --ppapi-flash-version=29.0.0.171 --flag-switches-begin --flag-switches-end
Driver Information
Initialization time 852
In-process GPU false
Passthrough Command Decoder false
Direct Composition false
Supports overlays false
Sandboxed true
GPU0 VENDOR = 0x1002, DEVICE= 0x68e0
GPU1 VENDOR = 0x1002, DEVICE= 0x9712
Optimus false
Optimus false
AMD switchable false
Driver vendor SwiftShader
Driver version 3.3.0
Driver date
Pixel shader version 1.00
Vertex shader version 1.00
Max. MSAA samples 4
Machine model name
Machine model version
GL_VENDOR Google Inc.
GL_RENDERER Google SwiftShader
GL_VERSION OpenGL ES 2.0 SwiftShader 3.3.0.2
GL_EXTENSIONS GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_depth32 GL_OES_depth_texture GL_OES_depth_texture_cube_map GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_element_index_uint GL_OES_framebuffer_object GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_texture_3D GL_EXT_blend_minmax GL_EXT_color_buffer_half_float GL_EXT_draw_buffers GL_EXT_instanced_arrays GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_NV_fence GL_NV_framebuffer_blit GL_NV_read_depth
Disabled Extensions
Disabled WebGL Extensions
Window system binding vendor Google Inc.
Window system binding version 1.4 SwiftShader 3.3.0.2
Window system binding extensions EGL_KHR_create_context EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_fence_sync EGL_KHR_image_base EGL_ANDROID_framebuffer_target EGL_ANDROID_recordable
Window manager GNOME Shell
XDG_CURRENT_DESKTOP GNOME
Compositing manager Yes
Direct rendering Yes
Reset notification strategy 0x0000
GPU process crash count 0
System visual ID 0
RGBA visual ID 0
Compositor Information
Tile Update Mode One-copy
Partial Raster Enabled
GpuMemoryBuffers Status
ATC Software only
ATCIA Software only
DXT1 Software only
DXT5 Software only
ETC1 Software only
R_8 Software only
R_16 Software only
RG_88 Software only
BGR_565 Software only
RGBA_4444 Software only
RGBX_8888 Software only
RGBA_8888 Software only
BGRX_8888 Software only
BGRX_1010102 Software only
RGBX_1010102 Software only
BGRA_8888 Software only
RGBA_F16 Software only
YVU_420 Software only
YUV_420_BIPLANAR Software only
UYVY_422 Software only
Display(s) Information
Info Display[13761487533244417] bounds=0,0 1600x900, workarea=0,48 1600x819, scale=1, external
Color space information {primaries:[[0.4555,0.3447,0.1640,],[0.2521,0.6149,0.1330,],[0.0201,0.0703,0.7345,],], transfer:0.0000*x + 0.0000 if x < 0.0000 else (1.0000*x + 0.0000)**2.2000 + 0.0000, matrix:RGB, range:FULL}
Bits per color component 8
Bits per pixel 24
Video Acceleration Information

pourtant un pauvre simple
debian:~$ grep -i 'model name' /proc/cpuinfo
model name : AMD Athlon(tm) II P340 Dual-Core Processor
model name : AMD Athlon(tm) II P340 Dual-Core Processor
jamais de gel du PC :cool: