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Sec. 411.187. SUSPENSION OF LICENSE. (a) A license may be suspended under this section if the license holder:
(1) is charged with the commission of a Class A or Class B misdemeanor or an offense under Section 42.01, Penal Code, or of a felony under an information or indictment;
(2) fails to display a license as required by Section 411.205;
(3) fails to notify the department of a change of address or name as required by Section 411.181;
(4) carries a concealed handgun under the authority of this subchapter of a different category than the license holder is licensed to carry;
(5) fails to return a previously issued license after a license is modified as required by Section 411.184(d);

On a side note DPS has never suspended anyone for failing to return a previously issued license and this is not enforced...