<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - RX-480 [drm:gfx_v8_0_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 0 test failed (scratch(0xC040)=0xCAFEDEAD)" href="https://bugs.freedesktop.org/show_bug.cgi?id=100964#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - RX-480 [drm:gfx_v8_0_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 0 test failed (scratch(0xC040)=0xCAFEDEAD)" href="https://bugs.freedesktop.org/show_bug.cgi?id=100964">bug 100964</a> from <a class="email" href="mailto:maxim.cournoyer@gmail.com" title="Maxim Cournoyer <maxim.cournoyer@gmail.com>"> Maxim Cournoyer</a> <pre>Hi! I have the exact same issue ``[drm:gfx_v8_0_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 0 test failed (scratch(0xC040)=0xCAFEDEAD)`` with a R9 285 GPU. I've had this problems for ages and had been using nomodeset to get by. I'm trying this on Debian 9 (stretch), with kernel ``Linux debian 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u2 (2017-06-26) x86_64 GNU/Linux``. I've attached the full dmesg. The interesting thing is that this seems to be related to the motherboard; when using the very same card (R9 285) in another system, *with the same software* (Debian 9), it works! It is not a hardware problem: the power supply is brand new (Seasonic G550W), the RAM tests fine, the SSD is brand new, the CMOS battery too, etc. The problem occurs on Asus M2N SLI Deluxe motherboard based system; and it disappears when using it with an equally old Asus P5W DH Deluxe based system. I notice there is a message saying that the clock source is unstable right before the error occurs; could it be related? Here is an excerpt of the dmesg: [ 11.552754] failed to send pre message 5b ret is 0 [ 11.748489] failed to send message 5b ret is 0 [ 11.748536] clocksource: timekeeping watchdog on CPU0: Marking clocksource 'tsc' as unstable because the skew is too large: [ 11.748538] clocksource: 'acpi_pm' wd_now: f69088 wd_last: ba62a0 mask: ffffff [ 11.748539] clocksource: 'tsc' cs_now: 167976623b cs_last: 12698f30d7 mask: ffffffffffffffff [ 11.957731] [drm:gfx_v8_0_ring_test_ring [amdgpu]] *ERROR* amdgpu: ring 0 test failed (scratch(0xC040)=0xCAFEDEAD) [ 11.957840] [drm:amdgpu_device_init [amdgpu]] *ERROR* hw_init of IP block <gfx_v8_0> failed -22 [ 11.957879] amdgpu 0000:03:00.0: amdgpu_init failed [ 12.171671] failed to send pre message 133 ret is 0 [ 12.385424] failed to send message 133 ret is 0 [ 12.385433] DPM is not running right now, no need to disable DPM! [ 12.386774] clocksource: Switched to clocksource acpi_pm [ 12.772038] I can provide dmesg from the working system (using the same software with the same card) if judged useful.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>