  Resistivity and Hall effect measurements have been carried out on a
micro-fabricated bridge of Bi2201 single crystal at low temperatures down to
0.4 K under high magnetic fields. When superconductivity is crashed by a high
magnetic field, the recovered "normal state" resistivity still shows a linear
temperature dependence in low temperature region. Combining with the effective
mass and the charge carrier density, we get a linear scattering rate $1/\tau =
\alpha k_{B} T/\hbar$ with $0.77<\alpha<1.16$, which gives a strong evidence of
the Planckian dissipation. Furthermore, our results reveal a new type of
temperature dependence of upper critical field,
$H_{c2}(T)=H^*\sqrt{(1-t)/(t+0.154)}$, which is totally different from the
expectation of the Ginzburg-Landau theory, and suggests uncondensed Cooper
pairs above $H_{c2}(T)$ line.
