efi.signed root=UUID= 24cb3fff- 5c01-4674- 9c59-58d7d776fd 70 ro quiet splash nomodeset vt.handoff=7 ProcKernelCmdLine: BOOT_IMAGE= /boot/vmlinuz- 4.4.0-31- generic. InstallationMedia: Xubuntu 16.04.1 LTS 'Xenial Xerus' - Release amd64 (20160719) InstallationDate: Installed on (1 days ago) Subsystem: Dell Broadwell-U Integrated Graphics Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 ) The graphics performance becomes terribly slow.ĬompizPlugins: No value set for `/apps/ compiz- 1/general/ screen0/ options/ active_ plugins' WORKAROUND: Boot from GRUB with the nomodeset parameter. The attached file 'amdgpu-bug.txt' is the reason why I'm pretty convinced that the problem is being caused by the amdgpu driver (although it seems to be related to how it interacts with the kernel, thus maybe the problem is kernel-related). However, it's not a hardware problem because I've already executed the Dell Hardware Diagnostics straight from the boot (it's an EFI utility), it tested all the hardware components (CPU, GPU, RAM, keyboard, touchpad, hard disk etc.) and didn't detect any faulty component. Sometimes I'm quick enough to go to TTYS1 and then I get to see some messages such as 'HARD LOCKUP on CPU0' and 'HARD LOCKUP on CPU1'. After upgrading to 16.04 'Xenial' (which doesn't support fglrx module/driver) amdgpu module is loaded by default but very frequently hangs the entire system. When I used XUbuntu 14.04 'Trusty' with AMD's fglrx (proprietary) driver I didn't experience such issue.

I usually select the 'Molecule' screensaver (it uses OpenGL), then I click the 'preview' button and wait for about 20 seconds, then I click the touchpad and the computer hangs. Only solution is to power off my laptop (press and hold the power button). I can still turn the keyboard LED backlight on and off (hence: keyboard doesn't stop working) but the pointer won't move (touchpad is locked) and I can't Ctrl-Alt-F (switch TTY/terminals). I have Xscreensaver installed and noticed that when it's running an OpenGL animation (screensaver) and I move the touchpad pointer the screen freezes. PROBLEM: system hangs / freezes very frequently. OPERATING SYSTEM: 64-bit GNU/Linux XUbuntu 16.04 'Xenial' CPU-integrated: Intel Corporation Broadwell-U Integrated Graphics (driver: i915)

Amd radeon r7 m260 crashes