Dear Thomas,
On 01/07/19 16:24, Thomas Gleixner wrote: > On Mon, 31 Dec 2018, Paul Menzel wrote: > >> Linux 4.19.13 from Debian Sid/unstable logs the message below on the board >> MSI >> MS-7A37/B350M MORTAR with the processor AMD Ryzen 3 2200G. >> >> As a result, the early time stamps do not seem to be working. > >>> [ 0.000000] DMI: Micro-Star International Co., Ltd. MS-7A37/B350M MORTAR >>> (MS-7A37), BIOS 1.I0 11/06/2018 >>> [ 0.000000] tsc: Fast TSC calibration failed > > And the further boot log says: > > [ 0.036000] tsc: Unable to calibrate against PIT > [ 0.036000] tsc: using HPET reference calibration > [ 0.036000] tsc: Detected 3500.117 MHz processor > > So the quick calibration in early boot fails because the PIT seems not to > do what the kernel expects. Nothing we can cure :( I see. Can AMD confirm that this is the expected behavior? If yes, should the fast TSC calibration be skipped on these devices? Kind regards, Paul
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