Thanks for that. Your system log shows it was Xorg crashing in the radeon driver:
mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: radeon: The kernel rejected CS, see dmesg for more information (-16). mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) Backtrace: mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 0: /usr/bin/Xwayland (OsLookupColor+0x13c) [0x563171f8122c] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7fd7d0f9547f] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (__nss_database_lookup+0x44c4) [0x7fd7d0ef52e4] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 3: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (radeon_drm_winsys_create+0x74483) [0x7fd7cf85bde3] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 4: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (radeon_drm_winsys_create+0x7a00b) [0x7fd7cf866c8b] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 5: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (radeon_drm_winsys_create+0x128cc) [0x7fd7cf7982fc] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 6: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (radeon_drm_winsys_create+0x13efe) [0x7fd7cf79b1fe] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 7: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (radeon_drm_winsys_create+0x19952) [0x7fd7cf7a6592] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 8: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (nouveau_drm_screen_create+0x214793) [0x7fd7cfd68943] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 9: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (nouveau_drm_screen_create+0x21489a) [0x7fd7cfd68c5a] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 10: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (radeon_drm_winsys_create+0x5e6cd) [0x7fd7cf8301dd] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 11: /usr/lib/x86_64-linux-gnu/dri/r600_dri.so (__driDriverGetExtensions_zink+0x3b139) [0x7fd7cf1266c9] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 12: /usr/bin/Xwayland (glamor_get_modifiers+0x76d) [0x563171e27e3d] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 13: /usr/bin/Xwayland (XkbDDXTerminateServer+0x102) [0x563171f325c2] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 14: /usr/bin/Xwayland (XkbDDXTerminateServer+0x12cb) [0x563171f3496b] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 15: /usr/bin/Xwayland (XkbDDXTerminateServer+0x683) [0x563171f33013] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 16: /usr/bin/Xwayland (XkbDDXTerminateServer+0xc16) [0x563171f33b46] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 17: /usr/bin/Xwayland (XkbDDXTerminateServer+0x1f90) [0x563171f362b0] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 18: /usr/bin/Xwayland (SendErrorToClient+0x354) [0x563171f4a5c4] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 19: /usr/bin/Xwayland (InitFonts+0x3b4) [0x563171f4e654] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 20: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x7fd7d0daf0b3] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) 21: /usr/bin/Xwayland (_start+0x2e) [0x563171e1c5be] mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) Bus error at address 0x7fd7d07c4000 mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: Fatal server error: mai 10 13:43:01 poe org.gnome.Shell.desktop[8107]: (EE) Caught signal 7 (Bus error). Server aborting ** Summary changed: - [radeon] Web benchmark freezing and crashing the system + [radeon] Web benchmark freezing and crashing the system (Xorg crashes in Mesa's r600_dri.so) ** Package changed: linux-hwe-5.8 (Ubuntu) => mesa (Ubuntu) ** Also affects: xserver-xorg-video-ati (Ubuntu) Importance: Undecided Status: New ** Changed in: mesa (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1926050 Title: [radeon] Web benchmark freezing and crashing the system (Xorg crashes in Mesa's r600_dri.so) Status in mesa package in Ubuntu: Incomplete Status in xserver-xorg-video-ati package in Ubuntu: Incomplete Bug description: Expected behavior: perform the "Basemark Web 3.0" benchmark (Firefox 87 and 88), at most a loss of performance. Real behavior: the benchmark completely crashes the system in one of the initial stages (4). The screen presents graphical distortion (it never happens), intense crashes and sometimes it is solved with the automatic suspension of the computer (which remains on at times). But it doesn't usually come back from the crash. The problem happens with the onboard ATI RADEON 3000 (RS780 driver) and it happens in both xorg and wayland. Ubuntu and kernel duly updated to the present date. Crash moment: WebGL 1.0.2 Test (test 4/20); "Loading scene_uv2.DAE...." Benchmark website: https://web.basemark.com/ Motherboard: GA78LMT Ubuntu 20.04.2 LTS Kernel 5.8.0-50-generic --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: poe 1860 F.... pulseaudio /dev/snd/pcmC2D0p: poe 1860 F...m pulseaudio /dev/snd/controlC0: poe 1860 F.... pulseaudio /dev/snd/controlC1: poe 1860 F.... pulseaudio BootLog: Error: [Errno 13] Permissão recusada: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME DistUpgraded: 2021-03-25 15:17:02,784 DEBUG /openCache(), new cache size 67025 DistroCodename: focal DistroRelease: Ubuntu 20.04 DistroVariant: ubuntu ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] RS780L [Radeon 3000] [1002:9616] (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd RS780L [Radeon 3000] [1458:d000] InstallationDate: Installed on 2021-03-04 (51 days ago) InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1) MachineType: Gigabyte Technology Co., Ltd. GA-78LMT-USB3 6.0 Package: xorg-server (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-50-generic root=/dev/mapper/vgubuntu-root ro quiet splash radeon.audio=1 vt.handoff=7 ProcVersionSignature: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18 RelatedPackageVersions: linux-restricted-modules-5.8.0-50-generic N/A linux-backports-modules-5.8.0-50-generic N/A linux-firmware 1.187.11 Tags: focal wayland-session wayland-session ubuntu Uname: Linux 5.8.0-50-generic x86_64 UpgradeStatus: Upgraded to focal on 2021-03-25 (30 days ago) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare _MarkForUpload: True dmi.bios.date: 11/25/2014 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F2 dmi.board.name: GA-78LMT-USB3 6.0 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: SEx dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd11/25/2014:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-USB36.0:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-USB36.0:rvrSEx:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-78LMT-USB3 6.0 dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1 version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1926050/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp